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Qwen3 Coder Flash

qwenqwen/qwen3-coder-flash

How TheRouter serves this differently from the vendor

As the vendor operates it

Alibaba Cloud operates Qwen3-Coder-Flash as a DashScope / Model Studio managed model with its own compatible-mode endpoints, regional routing, and multi-band input-length pricing.

On TheRouter

TheRouter exposes it as qwen/qwen3-coder-flash on the shared OpenAI-compatible /v1/chat/completions endpoint. The public catalog currently represents Alibaba's multiple price bands as a base tier plus one long-context tier, so very large prompts should be cost-tested before production rollout.

API guide

Chat completion

Use the standard OpenAI-compatible chat endpoint for code edits, explanations, and review triage.

cURL
curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen/qwen3-coder-flash",
    "messages": [
      {"role": "system", "content": "You are a senior software engineer. Return concise patches and tests."},
      {"role": "user", "content": "Explain this failing test and suggest the smallest fix: ..."}
    ],
    "temperature": 0.3,
    "max_tokens": 4096
  }'

Streaming

Enable streaming for IDE assistants so developers see progress before the full patch explanation is complete.

cURL
curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen/qwen3-coder-flash",
    "messages": [{"role": "user", "content": "Summarize the risky parts of this diff: ..."}],
    "stream": true
  }'

Tool calling

Use tools for repository search, test execution, and structured agent loops instead of asking the model to infer hidden project state.

cURL
curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen/qwen3-coder-flash",
    "messages": [{"role": "user", "content": "Find the module that owns retry backoff."}],
    "tools": [{
      "type": "function",
      "function": {
        "name": "repo_search",
        "description": "Search repository files by query",
        "parameters": {"type": "object", "properties": {"query": {"type": "string"}}, "required": ["query"]}
      }
    }],
    "tool_choice": "auto"
  }'

Structured JSON

Ask for JSON when a downstream service needs review labels, risk scores, or test-plan fields.

cURL
curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen/qwen3-coder-flash",
    "messages": [
      {"role": "system", "content": "Return JSON with keys risk, files, tests."},
      {"role": "user", "content": "Review this pull request: ..."}
    ],
    "response_format": {"type": "json_object"}
  }'
Fact ledger β€” every claim on this page traces here
sourceURLretrieved
Managed SKUwww.alibabacloud.com β†—2026-08-17verified
TheRouter public idwww.alibabacloud.com β†—2026-08-17verified
Context windowwww.alibabacloud.com β†—2026-08-17verified
Max outputwww.alibabacloud.com β†—2026-08-17verified
Modalitieswww.alibabacloud.com β†—2026-08-17verified
Supported operationswww.alibabacloud.com β†—2026-08-17verified
Pricing structurewww.alibabacloud.com β†—2026-08-17verified
Training cutoffβ€”β€”unknown
Qwen3-Coder family agentic codingqwenlm.github.io β†—2026-08-17verified
Tool calling / external environment workflowsalibabacloud.com β†—2026-08-17verified
Public Flash-specific benchmark disclosurealibabacloud.com β†—2026-08-17verified
DashScope documents OpenAI Responses API support for Qwen modelshelp.aliyun.com β†—2026-08-17verified
Qwen launches the Qwen3-Coder family and Qwen Codeqwenlm.github.io β†—2026-08-17verified
When should I choose qwen/qwen3-coder-flash instead of Plus or Next?www.alibabacloud.com β†—2026-08-17to verify
Does Qwen3-Coder-Flash support tool calling?www.alibabacloud.com β†—2026-08-17to verify
Is the 1M context free to use at the same price as small prompts?www.alibabacloud.com β†—2026-08-17to verify
Can I use it from Cursor, Cline, or another OpenAI-compatible client?www.alibabacloud.com β†—2026-08-17to verify
Are Flash benchmark scores published?www.alibabacloud.com β†—2026-08-17to verify
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