GET
/v1/models/openrouter/openrouter-stepfun-step-3-5-flash
Accept:
| rawId | stepfun/step-3.5-flash |
| displayName | StepFun: Step 3.5 Flash |
| id | openrouter-stepfun-step-3-5-flash |
| activity | chat |
| schemaEndpointId | chat/completions |
| releasedAt | 1769728337 — Jan 29, 2026 |
| firstSeenAt | 1769728337 — Jan 29, 2026 |
| lastSeenAt | 1794573939 — 7m ago |
| pricing | $0.1 / 1M input · $0.3 / 1M output → open calculator input_tokens (usage) · output_tokens (usage) |
| contextWindow | 262144 |
| maxOutput | 65536 |
| modalities | {"input":["text"],"output":["text"]} |
| capabilities | {"frequency_penalty":true,"include_reasoning":true,"max_tokens":true,"reasoning":true,"temperature":true,"tool_choice":true,"tools":true,"top_k":true,"top_p":true,"presence_penalty":true,"reasoning_effort":true,"response_format":true,"seed":true,"stop":true,"structured_outputs":true} |
| knowledgeCutoff · openWeights · weightsUrl · requestMap · providerMetadata | not published by this provider’s list endpoint |
Endpoints & schemas
GET /v1/schemas/openrouter →| endpoint | activity |
|---|---|
| chat/completions | chat |
endpoints matching this model — the provider has more, see /v1/schemas/openrouter
Sources
| field | recorded source |
|---|---|
| contextWindow | Source unknown — no source URL recorded. listing |
| maxOutput | Source unknown — no source URL recorded. listing |
| modalities | Source unknown — no source URL recorded. listing |
| pricing | Source unknown — no source URL recorded. listing |
| capabilities.frequency_penalty | Source unknown — no source URL recorded. listing |
| capabilities.include_reasoning | Source unknown — no source URL recorded. listing |
| capabilities.max_tokens | Source unknown — no source URL recorded. listing |
| capabilities.reasoning | Source unknown — no source URL recorded. listing |
| capabilities.temperature | Source unknown — no source URL recorded. listing |
| capabilities.tool_choice | Source unknown — no source URL recorded. listing |
| capabilities.tools | Source unknown — no source URL recorded. listing |
| capabilities.top_k | Source unknown — no source URL recorded. listing |
| capabilities.top_p | Source unknown — no source URL recorded. listing |
| capabilities.presence_penalty | https://openrouter.ai/openapi.json upstream-spec /properties/presence_penalty Source tracea698ac85ec9c7ae8bfa6add30d28e5f95c6b042ac547450e30ff6940ef6e5bd4{
"endpointId": "chat/completions",
"fetchedAt": 1794202205
} |
| capabilities.reasoning_effort | https://openrouter.ai/openapi.json upstream-spec /properties/reasoning/properties/effort Source tracea698ac85ec9c7ae8bfa6add30d28e5f95c6b042ac547450e30ff6940ef6e5bd4{
"endpointId": "chat/completions",
"fetchedAt": 1794202205
} |
| capabilities.response_format | https://openrouter.ai/openapi.json upstream-spec /properties/response_format Source tracea698ac85ec9c7ae8bfa6add30d28e5f95c6b042ac547450e30ff6940ef6e5bd4{
"endpointId": "chat/completions",
"fetchedAt": 1794202205
} |
| capabilities.seed | https://openrouter.ai/openapi.json upstream-spec /properties/seed Source tracea698ac85ec9c7ae8bfa6add30d28e5f95c6b042ac547450e30ff6940ef6e5bd4{
"endpointId": "chat/completions",
"fetchedAt": 1794202205
} |
| capabilities.stop | https://openrouter.ai/openapi.json upstream-spec /properties/stop Source tracea698ac85ec9c7ae8bfa6add30d28e5f95c6b042ac547450e30ff6940ef6e5bd4{
"endpointId": "chat/completions",
"fetchedAt": 1794202205
} |
| capabilities.structured_outputs | https://openrouter.ai/openapi.json upstream-spec /properties/response_format Source tracea698ac85ec9c7ae8bfa6add30d28e5f95c6b042ac547450e30ff6940ef6e5bd4{
"endpointId": "chat/completions",
"fetchedAt": 1794202205
} |
| reasoning | https://openrouter.ai/docs/guides/best-practices/reasoning-tokens.md Value unknown (null); not published in the checked source · checked 2026-10-09. |
| activity | Source unknown — no source URL recorded. |
| requestMap | Source unknown — no source URL recorded. |
| schemaEndpointId | Source unknown — no source URL recorded. |
Use it
shell
$ curl https://modelschemas.com/v1/schemas/openrouter/chat/chat/completions # request schema
$ curl -X POST https://modelschemas.com/v1/validate -d '{"provider":"openrouter","endpointId":"chat/completions","payload":{…}}'
$ curl -X POST https://modelschemas.com/v1/estimate -d '{"provider":"openrouter","model":"stepfun/step-3.5-flash","usage":{"input_tokens":1200,"output_tokens":400}}'