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Doubao Seed Evolving
bytedancebytedance/doubao-seed-evolving
How TheRouter serves this differently from the vendor
As the vendor operates it
ByteDance / Volcano Ark operates doubao-seed-evolving as a continuously updated Seed-family text model. The local standard-models note records that the vendor publishes a 1024k context figure.
On TheRouter
TheRouter exposes a text-only OpenAI-compatible chat route with the cataloged 256,000-token context window, 32,768-token max completion, and the parameters listed in standard-models.yaml. Treat TheRouter catalog values as the live contract unless account-level routing says otherwise.
API guide
Chat completion
Drop the evolving route into an OpenAI-compatible chat client for long-context coding or agent prompts.
cURL
curl https://api.therouter.ai/v1/chat/completions \
-H "Authorization: Bearer $THEROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"bytedance/doubao-seed-evolving","messages":[{"role":"system","content":"You are a careful coding agent."},{"role":"user","content":"Review this migration plan and return JSON with risks and next steps."}],"response_format":{"type":"json_object"}}'Tool calling
Use tools when the evolving model must inspect state and return function-call arguments for an agent workflow.
cURL
curl https://api.therouter.ai/v1/chat/completions \
-H "Authorization: Bearer $THEROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"bytedance/doubao-seed-evolving","messages":[{"role":"user","content":"Check whether ticket T-1024 needs escalation."}],"tools":[{"type":"function","function":{"name":"lookup_ticket","description":"Fetch a support ticket by id","parameters":{"type":"object","properties":{"ticket_id":{"type":"string"}},"required":["ticket_id"]}}}],"tool_choice":"auto"}'Fact ledger — every claim on this page traces here
| source | URL | retrieved | |
|---|---|---|---|
| TheRouter model id | TheRouter model catalog ↗ | 2026-08-03 | verified |
| Upstream model | provider-models/volcengine-ark.yaml ↗ | 2026-08-03 | verified |
| Update model | standard-models.yaml ↗ | 2026-08-03 | verified |
| Context window | standard-models.yaml ↗ | 2026-08-03 | verified |
| Vendor context note | standard-models.yaml ↗ | 2026-08-03 | verified |
| Maximum completion | standard-models.yaml ↗ | 2026-08-03 | verified |
| Input / output modalities | standard-models.yaml ↗ | 2026-08-03 | verified |
| Supported OpenAI-style parameters | standard-models.yaml ↗ | 2026-08-03 | verified |
| TheRouter price | TheRouter model catalog ↗ | 2026-08-03 | verified |
| Route capabilities | provider-models/volcengine-ark.yaml ↗ | 2026-08-03 | verified |
| Release / launch context | news.qq.com ↗ | 2026-08-03 | verified |
| License / weights | standard-models.yaml ↗ | 2026-08-03 | verified |
| Training cutoff | — | — | unknown |
| Coding benchmarks | news.qq.com ↗ | 2026-08-03 | unknown |
| Agent benchmarks | news.qq.com ↗ | 2026-08-03 | unknown |
| TheRouter latency sample | TheRouter model catalog ↗ | 2026-08-03 | unknown |
| ByteDance introduces Doubao Seed Evolving with the Seed 2.1 wave | news.qq.com ↗ | 2026-08-03 | verified |
| Is Doubao Seed Evolving OpenAI-compatible on TheRouter? | standard-models.yaml ↗ | 2026-08-03 | to verify |
| How is Evolving different from Doubao Seed 2.1 Pro? | news.qq.com ↗ | 2026-08-03 | to verify |
| Should I use an evolving model in production? | standard-models.yaml ↗ | 2026-08-03 | to verify |