Qwen3 Coder Flash
How TheRouter serves this differently from the vendor
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.
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 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 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 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 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
| source | URL | retrieved | |
|---|---|---|---|
| Managed SKU | www.alibabacloud.com β | 2026-08-17 | verified |
| TheRouter public id | www.alibabacloud.com β | 2026-08-17 | verified |
| Context window | www.alibabacloud.com β | 2026-08-17 | verified |
| Max output | www.alibabacloud.com β | 2026-08-17 | verified |
| Modalities | www.alibabacloud.com β | 2026-08-17 | verified |
| Supported operations | www.alibabacloud.com β | 2026-08-17 | verified |
| Pricing structure | www.alibabacloud.com β | 2026-08-17 | verified |
| Training cutoff | β | β | unknown |
| Qwen3-Coder family agentic coding | qwenlm.github.io β | 2026-08-17 | verified |
| Tool calling / external environment workflows | alibabacloud.com β | 2026-08-17 | verified |
| Public Flash-specific benchmark disclosure | alibabacloud.com β | 2026-08-17 | verified |
| DashScope documents OpenAI Responses API support for Qwen models | help.aliyun.com β | 2026-08-17 | verified |
| Qwen launches the Qwen3-Coder family and Qwen Code | qwenlm.github.io β | 2026-08-17 | verified |
| When should I choose qwen/qwen3-coder-flash instead of Plus or Next? | www.alibabacloud.com β | 2026-08-17 | to verify |
| Does Qwen3-Coder-Flash support tool calling? | www.alibabacloud.com β | 2026-08-17 | to verify |
| Is the 1M context free to use at the same price as small prompts? | www.alibabacloud.com β | 2026-08-17 | to verify |
| Can I use it from Cursor, Cline, or another OpenAI-compatible client? | www.alibabacloud.com β | 2026-08-17 | to verify |
| Are Flash benchmark scores published? | www.alibabacloud.com β | 2026-08-17 | to verify |