GET

/v1/models/opencode/gpt-5.3-codex-spark

Accept:

provider opencodestatus activefirst seen Feb 5, 2026last seen 5m ago

rawId	gpt-5.3-codex-spark
displayName	GPT-5.3 Codex Spark
id	opencode-gpt-5-3-codex-spark
activity	chat
schemaEndpointId	inference/openai/v1/responses input · output
releasedAt	1770249600 — Feb 5, 2026
firstSeenAt	1770249600 — Feb 5, 2026
lastSeenAt	1794560597 — 5m ago
pricing	$1.75 / 1M input · $14 / 1M output → open calculator https://raw.githubusercontent.com/anomalyco/opencode/dev/services/site/src/docs/content/console/models.mdx input_tokens (usage) · output_tokens (usage) · cache_read_tokens (usage)
contextWindow	128000
maxOutput	128000
modalities	{"input":["text"],"output":["text"]}
capabilities	{"tools":true,"reasoning":true,"structured_outputs":true,"vision":false}
knowledgeCutoff	"2025-08-31"
openWeights	false
providerMetadata	{"attachment":false,"canonical_model_id":"openai/gpt-5.3-codex-spark","cost":{"cache_read":0.175,"input":1.75,"output":14},"description":"Coding-optimized GPT model for repository edits, reviews, and agentic software work","family":"gpt-codex-spark","id":"gpt-5.3-codex-spark","knowledge":"2025-08-31","last_updated":"2026-02-05","limit":{"context":128000,"input":128000,"output":128000},"modalities":{"input":["text"],"output":["text"]},"name":"GPT-5.3 Codex Spark","open_weights":false,"provider":{"api":"https://opencode.ai/inference/openai/v1","npm":"@ai-sdk/openai"},"reasoning":true,"reasoning_options":[{"type":"effort","values":["low","medium","high","xhigh"]}],"release_date":"2026-02-05","structured_output":true,"temperature":false,"tool_call":true}
weightsUrl · requestMap	not published by this provider’s list endpoint

Endpoints & schemas

GET /v1/schemas/opencode →

endpoint	activity
inference/openai/v1/responses input · output	chat

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

Sources

field	recorded source
contextWindow	https://models.dev/api.json listing opencode.models.gpt-5.3-codex-spark.limit.context Source trace `cc6d13d3f27b31b7ddfa28df1fcc4e98756f31f7429cd9a4e90a1158e0bbedff`
maxOutput	https://models.dev/api.json listing opencode.models.gpt-5.3-codex-spark.limit.output Source trace `cc6d13d3f27b31b7ddfa28df1fcc4e98756f31f7429cd9a4e90a1158e0bbedff`
modalities	https://models.dev/api.json listing opencode.models.gpt-5.3-codex-spark.modalities Source trace `cc6d13d3f27b31b7ddfa28df1fcc4e98756f31f7429cd9a4e90a1158e0bbedff`
pricing	Source linked above. docs-derived Source trace `7c679ba1d370b4f455e84534094cfa25c1a6ce2b3c48479fdfbda654aaddda89`
reasoning	https://models.dev/api.json listing opencode.models.gpt-5.3-codex-spark.reasoning_options Source trace `cc6d13d3f27b31b7ddfa28df1fcc4e98756f31f7429cd9a4e90a1158e0bbedff`
knowledgeCutoff	https://models.dev/api.json listing opencode.models.gpt-5.3-codex-spark.knowledge Source trace `cc6d13d3f27b31b7ddfa28df1fcc4e98756f31f7429cd9a4e90a1158e0bbedff`
openWeights	https://models.dev/api.json listing opencode.models.gpt-5.3-codex-spark.open_weights Source trace `cc6d13d3f27b31b7ddfa28df1fcc4e98756f31f7429cd9a4e90a1158e0bbedff`
schemaEndpointId	https://models.dev/api.json listing opencode.models.gpt-5.3-codex-spark.provider Source trace `cc6d13d3f27b31b7ddfa28df1fcc4e98756f31f7429cd9a4e90a1158e0bbedff`
capabilities.tools	https://models.dev/api.json listing opencode.models.gpt-5.3-codex-spark.tool_call Source trace `cc6d13d3f27b31b7ddfa28df1fcc4e98756f31f7429cd9a4e90a1158e0bbedff`
capabilities.reasoning	https://models.dev/api.json listing opencode.models.gpt-5.3-codex-spark.reasoning Source trace `cc6d13d3f27b31b7ddfa28df1fcc4e98756f31f7429cd9a4e90a1158e0bbedff`
capabilities.structured_outputs	https://models.dev/api.json listing opencode.models.gpt-5.3-codex-spark.structured_output Source trace `cc6d13d3f27b31b7ddfa28df1fcc4e98756f31f7429cd9a4e90a1158e0bbedff`
capabilities.vision	https://models.dev/api.json listing opencode.models.gpt-5.3-codex-spark.modalities.input Source trace `cc6d13d3f27b31b7ddfa28df1fcc4e98756f31f7429cd9a4e90a1158e0bbedff`
requestMap	https://opencode.ai/docs/zen Value unknown (null); not published in the checked source · checked 2026-10-09.
requestMapFields.replayReasoningContent	https://opencode.ai/docs/zen Value unknown (null); not published in the checked source · checked 2026-10-09.
activity	Source unknown — no source URL recorded.

Use it

shell

$ curl https://modelschemas.com/v1/schemas/opencode/chat/inference/openai/v1/responses # request schema
$ curl -X POST https://modelschemas.com/v1/validate -d '{"provider":"opencode","endpointId":"inference/openai/v1/responses","payload":{…}}'
$ curl -X POST https://modelschemas.com/v1/estimate -d '{"provider":"opencode","model":"gpt-5.3-codex-spark","usage":{"input_tokens":1200,"output_tokens":400}}'