GET

/v1/models/openai/gpt-5.1-codex-mini

provider openaistatus activefirst seen Nov 13, 2025last seen 9d agodeprecated Nov 4, 2026
rawIdgpt-5.1-codex-mini
displayNameGPT 5.1 Codex Mini
idopenai-gpt-5-1-codex-mini
activitychat
schemaEndpointIdchat/completions
input · output
releasedAt1763007109 — Nov 13, 2025
firstSeenAt1763007109 — Nov 13, 2025
lastSeenAt1793835014 — 9d ago
pricing
$0.25 / 1M input · $2 / 1M output → open calculator
input_tokens (usage) · cache_read_tokens (usage) · output_tokens (usage)
capabilities{"temperature":true,"top_p":true,"reasoning_effort":true,"max_tokens":true,"frequency_penalty":true,"presence_penalty":true,"response_format":true,"stop":true,"seed":true,"tools":true,"tool_choice":true,"structured_outputs":true}
requestMap{"thinking":{"on":{"reasoning_effort":"high"},"off":null,"levels":{"off":"none","minimal":null,"low":"low","medium":"medium","high":"high","xhigh":null,"max":null}},"maxTokensField":"max_completion_tokens","developerRole":true,"replayReasoningContent":null,"store":null,"strictTools":null,"sessionAffinity":null,"cacheControl":null,"toolStream":null,"reasoningEffort":true}
contextWindow · maxOutput · modalities · knowledgeCutoff · openWeights · weightsUrl · providerMetadatanot published by this provider’s list endpoint

Endpoints & schemas

GET /v1/schemas/openai →
endpointactivity
chat/completions
input · output
chat
chat/completions/{completion_id}
input · output
chat

endpoints matching this model — the provider has more, see /v1/schemas/openai

Sources

fieldrecorded source
capabilities.temperaturehttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/temperature

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
capabilities.top_phttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/top_p

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
capabilities.reasoning_efforthttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/reasoning_effort

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
capabilities.max_tokenshttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/max_completion_tokens

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
capabilities.frequency_penaltyhttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/frequency_penalty

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
capabilities.presence_penaltyhttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/presence_penalty

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
capabilities.response_formathttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/response_format

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
capabilities.stophttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/stop

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
capabilities.seedhttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/seed

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
capabilities.toolshttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/tools

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
capabilities.tool_choicehttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/tool_choice

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
capabilities.structured_outputshttps://raw.githubusercontent.com/openai/openai-node/main/api_reference/openapi.transformed.yml

upstream-spec

/properties/response_format

Source trace
fb72772dc5ac65c0457451fcab125a37ffa22b6aea98546e7be3f49396be4442
{
  "endpointId": "chat/completions",
  "fetchedAt": 1793769007
}
pricingSource linked above.

docs-derived

Pricing

Source trace
cefeb00b4de8997410914fd639485f4850fe43bdd11d354c028c2dc4421a2748
reasoninghttps://developers.openai.com/api/docs/models/gpt-5.1-codex-mini.md

Value unknown (null); not published in the checked source · checked 2026-10-09.

activitySource unknown — no source URL recorded.
contextWindowSource unknown — no source URL recorded.
maxOutputSource unknown — no source URL recorded.
modalitiesSource unknown — no source URL recorded.
requestMapSource unknown — no source URL recorded.
schemaEndpointIdSource unknown — no source URL recorded.

Use it

shell
$ curl https://modelschemas.com/v1/schemas/openai/chat/chat/completions # request schema
$ curl -X POST https://modelschemas.com/v1/validate -d '{"provider":"openai","endpointId":"chat/completions","payload":{…}}'
$ curl -X POST https://modelschemas.com/v1/estimate -d '{"provider":"openai","model":"gpt-5.1-codex-mini","usage":{"input_tokens":1200,"output_tokens":400}}'