Capability matrix

Every table on this page is generated from the code that serves requests and from the production model policy, so it cannot say something the router doesn't do. Where a cell says a parameter is dropped, the response header X-MindsHub-Dropped-Params will name it at request time; where it says clamped, X-MindsHub-Clamped-Params will (except on a stream whose 200 went out early; see Errors). The rule behind both is in Core concepts.

Legend

Cell	Meaning
yes	Honored on every model behind this API.
per model	Honored where the target model takes it, dropped and named in X-MindsHub-Dropped-Params where it doesn't. The models table says which.
partial	Honored with a limitation stated in the row's notes.
no	Accepted and ignored. The request succeeds and the feature silently doesn't happen.
400	Refused with a 400 naming the field, because serving the request would answer a different question than the one asked.
no field	This API's wire format has no field for it.
forwarded / adapted / conditional / ignored / rejected	The parameter table's own vocabulary: relayed as sent; honored with translation; honored per model; accepted and ignored; refused with a 400.

Features by API

One row per feature, one column per request format. Spellings differ by API; the semantics are the same because all three reach the same service.

Feature	Chat Completions	Responses	Messages	Notes
Streaming	yes · stream	yes · stream	yes · stream
Tool calling	yes · tools	yes · tools	yes · tools
Parallel tool calls	per model · parallel_tool_calls	per model · parallel_tool_calls	per model · tool_choice.disable_parallel_tool_use
Structured output (JSON schema)	per model · response_format	per model · text.format	per model · output_config.format	The one parameter refused rather than dropped when the model can't honor it.
Schema-less JSON mode	partial	partial	no field	json_object is a 400 on the Claude family, which has no schema-less mode.
Reasoning effort	per model · reasoning_effort	per model · reasoning.effort	per model · output_config.effort
Extended thinking object	no field	no field	per model · thinking
Reasoning carried across turns	no field	per model · include: reasoning.encrypted_content	no field
Web search	yes	yes	yes	Native or external per model; the models table says which. On a model without search the web tools are dropped.
Images in	yes	yes	yes	Accepted on every model; a model without vision returns its provider's own error.
PDF / file input	partial	no	no	A Chat Completions file part reaches OpenAI-transport models only; Responses input_file parts and Anthropic Files API references are dropped.
Automatic prompt caching	yes	yes	yes
Explicit cache breakpoints	no field	no field	partial	Block-level cache_control is honored on Claude-family targets; the top-level auto-caching switch is ignored.
Server-side conversation state	no · store	yes · store	no field	store and previous_response_id; 30-day retention, chains walked 25 turns back.
Stored-response operations	no field	yes	no field	GET/DELETE /v1/responses/{id}, input_items, cancel.
Token counting endpoint	no field	no field	yes	POST /v1/messages/count_tokens, free and unmetered.
Legacy functions / function_call	yes · functions	no field	no field
web_search_options	yes · web_search_options	no field	no field
Sampling (temperature, top_p)	per model · temperature	per model · temperature	per model · temperature
seed and repetition penalties	per model · seed	no field	no field
verbosity	per model · verbosity	per model · text.verbosity	no field
Conversations API (conversation)	no field	400 · conversation	no field

Request parameters by API

One row per parameter concept. Each cell shows how that API treats it (forwarded, adapted, conditional on the model, ignored, or rejected with a 400) and the spelling that API uses. The same tables, filtered to one API, appear on each API reference page.

Group	Parameter	Chat Completions	Responses	Messages
Structure	model	adapted · model	adapted · model	adapted · model
Structure	conversation so far	adapted · messages	adapted · input	conditional · messages
Structure	system prompt	adapted · messages[role=system]	adapted · instructions	conditional · system
Structure	stream	forwarded · stream	forwarded · stream	forwarded · stream
Structure	stream_options	adapted · stream_options	ignored · stream_options	no field
Generation	max_tokens	conditional · max_tokens	conditional · max_output_tokens	conditional · max_tokens
Generation	max_completion_tokens	adapted · max_completion_tokens	no field	no field
Generation	temperature	conditional · temperature	conditional · temperature	conditional · temperature
Generation	top_p	conditional · top_p	conditional · top_p	conditional · top_p
Generation	top_k	conditional · top_k	no field	conditional · top_k
Generation	stop_sequences	conditional · stop	no field	conditional · stop_sequences
Generation	seed	conditional · seed	no field	no field
Generation	presence_penalty	conditional · presence_penalty	no field	no field
Generation	frequency_penalty	conditional · frequency_penalty	no field	no field
Generation	verbosity	conditional · verbosity	conditional · text.verbosity	no field
Reasoning	reasoning_effort	conditional · reasoning_effort	conditional · reasoning.effort	adapted · output_config.effort
Reasoning	thinking	no field	no field	conditional · thinking
Reasoning	include	no field	conditional · include	no field
Tools	tools	adapted · tools	adapted · tools	adapted · tools
Tools	tool_choice	adapted · tool_choice	adapted · tool_choice	adapted · tool_choice
Tools	parallel_tool_calls	conditional · parallel_tool_calls	conditional · parallel_tool_calls	adapted · tool_choice.disable_parallel_tool_use
Tools	web_search_options	adapted · web_search_options	no field	no field
Tools	mcp_servers	no field	no field	adapted · mcp_servers
Tools	functions	adapted · functions	no field	no field
Tools	function_call	adapted · function_call	no field	no field
Output shape	response_format	conditional · response_format	conditional · text.format	adapted · output_config.format
Storage and chaining	store	ignored · store	adapted · store	no field
Storage and chaining	previous_response_id	no field	adapted · previous_response_id	no field
Storage and chaining	background	no field	ignored · background	no field
Accepted and ignored	metadata	ignored · metadata	ignored · metadata	ignored · metadata
Accepted and ignored	user	ignored · user	ignored · user	no field
Accepted and ignored	safety_identifier	ignored · safety_identifier	ignored · safety_identifier	no field
Accepted and ignored	service_tier	ignored · service_tier	ignored · service_tier	ignored · service_tier
Accepted and ignored	prompt_cache_key	ignored · prompt_cache_key	ignored · prompt_cache_key	no field
Accepted and ignored	prompt_cache_retention	ignored · prompt_cache_retention	ignored · prompt_cache_retention	no field
Accepted and ignored	n	ignored · n	no field	no field
Accepted and ignored	logprobs	ignored · logprobs	no field	no field
Accepted and ignored	top_logprobs	ignored · top_logprobs	ignored · top_logprobs	no field
Accepted and ignored	logit_bias	ignored · logit_bias	no field	no field
Accepted and ignored	prediction	ignored · prediction	no field	no field
Accepted and ignored	modalities	ignored · modalities	no field	no field
Accepted and ignored	audio	ignored · audio	no field	no field
Accepted and ignored	truncation	no field	ignored · truncation	no field
Accepted and ignored	max_tool_calls	no field	ignored · max_tool_calls	no field
Accepted and ignored	cache_control (top-level)	no field	no field	ignored · cache_control
Accepted and ignored	container	no field	no field	ignored · container
Accepted and ignored	inference_geo	no field	no field	ignored · inference_geo
Refused	conversation	no field	rejected (400) · conversation	no field
Refused	prompt	no field	rejected (400) · prompt	no field
Refused	context_management	no field	rejected (400) · context_management	no field

Providers

Transport-level facts about each upstream provider. The models table below already has these intersected in; this table explains why a model row reads the way it does.

Provider	Transport	Native web search	External search loop	Remote MCP	MCP approvals	MCP deny-list	Named tool_choice	tool_choice: none	Params the transport can't carry	max_tokens floor	Notes
openai	openai_responses	openai_native	no	native	yes	no	yes	yes	top_k, stop_sequences, thinking, seed, presence_penalty, frequency_penalty	16	Real api.openai.com rejects max_tokens below 16; requests below the floor are raised to it.
anthropic	anthropic_messages	anthropic_native	no	native	no	yes	yes	yes	seed, presence_penalty, frequency_penalty, verbosity	none
gemini	gemini_native	gemini_google_search	no	our client	no	yes	yes	yes	thinking, parallel_tool_calls, verbosity	none	Sets thinking depth through thinking_level, which the effort parameter carries; the fetch web tool is always dropped.
fireworks	fireworks	no	yes	our client	no	yes	yes	no	thinking, seed, presence_penalty, frequency_penalty, verbosity	none	Shares Anthropic's wire shape but not its backend: tool_choice: none is honored by dropping the tools.
moonshot	moonshot	moonshot_native	yes	our client	no	yes	no	yes	thinking, reasoning_effort, verbosity	none	Kimi reasons internally with no adjustable level. Its own $web_search builtin or the external loop, per policy.
meta	fireworks	no	yes	our client	no	yes	yes	no	thinking, seed, presence_penalty, frequency_penalty, verbosity	none	As Fireworks. response_format is emulated as a synthetic tool call rather than sent natively, forced where the alias allows it and offered unforced (best effort) where it doesn't, pending verification of Meta's own spelling.
cerebras	moonshot	no	yes	our client	no	yes	yes	yes	thinking, top_k, verbosity	none
groq	moonshot	no	yes	our client	no	yes	yes	yes	thinking, top_k, verbosity	none
xai	openai_responses	openai_native	no	native	no	no	yes	yes	top_k, stop_sequences, thinking, seed, presence_penalty, frequency_penalty, verbosity	none	OpenAI-compatible Responses transport; verbosity unverified and dropped.

Request structure per transport

What a request's shape may say on each wire, as opposed to what its parameters may say. A client can send a content block or a tool-schema keyword the target has no field for; where that happens it is dropped rather than forwarded into a 400, and named on X-MindsHub-Dropped-Content.

Two transports forward what they do not recognize instead, and the reason is published here rather than left to be inferred.

Transport	Providers	Content blocks it carries	A block type it does not declare	Tool schema
anthropic_messages	anthropic	document, image, image_url, redacted_thinking, search_result, server_tool_use, text, thinking, tool_result, tool_use, web_search_tool_result	forwarded — the target speaks Anthropic natively, so a block type this build has not enumerated is far more likely to be a new Anthropic block than a foreign one, and dropping it would break a request the upstream serves perfectly well	json_schema
fireworks	fireworks, meta	image, image_url, text, tool_result, tool_use	dropped and reported	json_schema
gemini_native	gemini	image_url, text	dropped and reported	gemini_openapi
moonshot	cerebras, groq, moonshot	image_url, text	dropped and reported	json_schema
openai_responses	openai, xai	computer_screenshot, encrypted_content, file, image, image_url, input_audio, input_file, input_image, input_text, output_text, refusal, summary_text, text	forwarded — this transport carries every backend speaking an OpenAI-compatible Responses API, not just real OpenAI — xAI reuses it unchanged — so a type outside the allowlist may be exactly right for whichever backend the request is routed to, and this gateway cannot tell	json_schema

Models

One row per generation alias, in the order GET /v1/models lists them. Pinned versions share their family's facts. Embedding aliases are on Embeddings.

Alias	Provider	Effort levels	thinking object	Web search	Named tool_choice	tool_choice: none	Parallel tool calls	JSON schema	JSON mode	Sampling	Stop sequences	seed and penalties	verbosity	Max output tokens	Context window	Notes
mindshub_air	openai	not adjustable	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
mindshub_blaze	cerebras	none · high	no	none	yes	yes	yes	yes	yes	temperature, top_p	yes	seed, presence_penalty, frequency_penalty	no	provider default	131,072
gpt-oss-fireworks	fireworks	not adjustable	no	none	yes	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	131,072
sonnet	anthropic	low · medium · high · xhigh · max	yes	native	→ auto	drops tools	yes	yes	400	none	yes	none	no	128,000	1,000,000
sonnet-5-5	anthropic	low · medium · high · xhigh · max	yes	native	→ auto	drops tools	yes	yes	400	none	yes	none	no	128,000	1,000,000
sonnet-5	anthropic	low · medium · high · max	yes	native	yes	yes	yes	yes	400	none	yes	none	no	128,000	1,000,000
opus	anthropic	low · medium · high · xhigh · max	yes	native	→ auto	drops tools	yes	yes	400	none	yes	none	no	128,000	1,000,000
opus-5-5	anthropic	low · medium · high · xhigh · max	yes	native	→ auto	drops tools	yes	yes	400	none	yes	none	no	128,000	1,000,000
opus-5	anthropic	low · medium · high · xhigh · max	yes	native	yes	yes	yes	yes	400	none	yes	none	no	128,000	1,000,000
fable	anthropic	low · medium · high · xhigh · max	yes	native	→ auto	drops tools	yes	yes	400	none	yes	none	no	128,000	1,000,000
fable-5-1	anthropic	low · medium · high · xhigh · max	yes	native	→ auto	drops tools	yes	yes	400	none	yes	none	no	128,000	1,000,000
fable-5	anthropic	low · medium · high · xhigh · max	yes	native	yes	yes	yes	yes	400	none	yes	none	no	128,000	1,000,000
haiku	anthropic	not adjustable	yes	native	yes	yes	yes	yes	400	temperature, top_p, top_k	yes	none	no	provider default	200,000	[b]
haiku-4-5	anthropic	not adjustable	yes	native	yes	yes	yes	yes	400	temperature, top_p, top_k	yes	none	no	provider default	200,000	[b]
gpt	openai	low · medium · high · xhigh · max	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
gpt-6-astra	openai	low · medium · high · xhigh · max	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
gpt-5-6-sol	openai	none · low · medium · high · xhigh · max	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
gpt-sol	openai	low · medium · high · xhigh · max	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
gpt-sol-6	openai	none · low · medium · high · xhigh · max	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
gpt-sol-6-1	openai	low · medium · high · xhigh · max	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
gpt-terra	openai	none · low · medium · high · xhigh · max	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
gpt-terra-5-6	openai	none · low · medium · high · xhigh · max	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
gpt-luna	openai	none · low · medium · high · xhigh · max	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
gpt-luna-5-6	openai	none · low · medium · high · xhigh · max	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
gpt-luna-6	openai	none · low · medium · high · xhigh · max	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	1,050,000	[a]
gpt-codex	openai	low · medium · high · xhigh	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	400,000	[a]
gpt-codex-5-3	openai	low · medium · high · xhigh	no	native	yes	yes	yes	yes	yes	none	no	none	yes	128,000	400,000	[a]
gpt-mini	openai	none · low · medium · high · xhigh	no	native	yes	yes	yes	yes	yes	temperature, top_p	no	none	yes	provider default	400,000	[a]
gpt-mini-5-4	openai	none · low · medium · high · xhigh	no	native	yes	yes	yes	yes	yes	temperature, top_p	no	none	yes	provider default	400,000	[a]
gpt-nano	openai	none · low · medium · high · xhigh	no	native	yes	yes	yes	yes	yes	temperature, top_p	no	none	yes	provider default	400,000	[a]
gpt-nano-5-4	openai	none · low · medium · high · xhigh	no	native	yes	yes	yes	yes	yes	temperature, top_p	no	none	yes	provider default	400,000	[a]
gemini	gemini	low · medium · high	no	native	yes	yes	no	yes	yes	none	yes	seed, presence_penalty, frequency_penalty	no	65,536	1,048,576
gemini-3-1-pro	gemini	low · medium · high	no	native	yes	yes	no	yes	yes	none	yes	seed, presence_penalty, frequency_penalty	no	65,536	1,048,576
gemini-flash	gemini	low · medium · high	no	native	yes	yes	no	yes	yes	none	yes	seed, presence_penalty, frequency_penalty	no	65,536	1,048,576
gemini-flash-3-8	gemini	low · medium · high	no	native	yes	yes	no	yes	yes	none	yes	seed, presence_penalty, frequency_penalty	no	65,536	1,048,576
gemini-flash-3-7	gemini	low · medium · high	no	native	yes	yes	no	yes	yes	none	yes	seed, presence_penalty, frequency_penalty	no	65,536	1,048,576
gemini-flash-3-6	gemini	minimal · low · medium · high	no	native	yes	yes	no	yes	yes	none	yes	seed, presence_penalty, frequency_penalty	no	65,536	1,048,576
gemini-flash-3-5	gemini	minimal · low · medium · high	no	native	yes	yes	no	yes	yes	none	yes	seed, presence_penalty, frequency_penalty	no	65,536	1,048,576
gemini-flash-3	gemini	minimal · low · medium · high	no	native	yes	yes	no	yes	yes	temperature, top_p, top_k	yes	seed, presence_penalty, frequency_penalty	no	provider default	1,048,576
gemini-flash-lite	gemini	minimal · low · medium · high	no	native	yes	yes	no	yes	yes	none	yes	seed, presence_penalty, frequency_penalty	no	65,536	1,048,576
gemini-flash-lite-3-1	gemini	minimal · low · medium · high	no	native	yes	yes	no	yes	yes	none	yes	seed, presence_penalty, frequency_penalty	no	65,536	1,048,576
kimi	fireworks	not adjustable	no	external (exa)	yes	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	—	[c]
kimi-k3	fireworks	not adjustable	no	external (exa)	yes	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	—
deepseek-v4-flash	fireworks	none · low · high · max	no	external (exa)	yes	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	—
deepseek-v4-1-flash	fireworks	none · low · high · max	no	external (exa)	yes	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	—
qwen	fireworks	low · medium · xhigh	no	external (exa)	yes	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	—
qwen-3-8-a95b	fireworks	low · medium · xhigh	no	external (exa)	yes	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	—
glm	fireworks	low · high · max	no	external (exa)	yes	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	—
glm-5-3	fireworks	low · high · max	no	external (exa)	yes	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	—
glm-5-3-flash	fireworks	low · high · max	no	external (exa)	yes	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	—
glm-flash-5-3	fireworks	low · high · max	no	external (exa)	yes	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	—
muse-spark	meta	not adjustable	no	external (exa)	→ auto	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	1,048,576	[d]
muse-spark-1-3	meta	not adjustable	no	external (exa)	→ auto	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	1,048,576
muse-spark-1-2	meta	not adjustable	no	external (exa)	→ auto	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	1,048,576
muse-spark-1-1	meta	not adjustable	no	external (exa)	→ auto	drops tools	yes	yes	yes	temperature, top_p, top_k	yes	none	no	provider default	1,048,576
grok	xai	low · medium · high · xhigh	no	native	yes	yes	yes	yes	yes	temperature, top_p	no	none	no	provider default	500,000
grok-4-7	xai	low · medium · high · xhigh	no	native	yes	yes	yes	yes	yes	temperature, top_p	no	none	no	provider default	500,000
grok-4-6	xai	low · medium · high · xhigh	no	native	yes	yes	yes	yes	yes	temperature, top_p	no	none	no	provider default	500,000
grok-4-5	xai	low · medium · high	no	native	yes	yes	yes	yes	yes	temperature, top_p	no	none	no	provider default	500,000

• [a] max_tokens below 16 is raised to 16.
• [b] Takes temperature or top_p, not both: when both are sent, top_p is dropped and named in X-MindsHub-Dropped-Params.
• [c] Takes temperature only at 1 and top_p only at 0.95; other values return the provider's own 400. Tool schemas are normalized for Kimi's stricter validator.
• [d] Only tool_choice: "auto" is accepted upstream; named and required are rewritten to auto, none is honored by dropping the tools. response_format is emulated as an unforced synthetic tool call rather than sent natively (this alias cannot force one), pending verification of Meta's own spelling — best effort, not guaranteed — see Structured output.

No production alias currently routes to: moonshot, groq.

Generated from the live production model policy on 2026-10-08.