StreamLake KAT-Coder 256K Now Live — Whole-Repository Code Reasoning
KAT-Coder 256K is StreamLake's code-specialist flagship at the largest context tier (256,000 tokens). Built for the workflows where context windows actually matter — whole-repository refactors, cross-file security audits, framework migrations — at $2.66/M input and $10.64/M output. Served via streamlake (CN-region partner capacity).
When to reach for it
- Repository-wide refactors — the 256K window fits a mid-sized monorepo subdirectory.
- Security audits across cross-file call chains where local context loses critical signal.
- Framework migrations requiring consistency across hundreds of files.
- Code generation for new modules grounded in existing project conventions.
Pricing & capabilities
| Property | Value |
|---|---|
| Standard alias | streamlake/kat-coder-256k |
| Input price | $2.66 / 1M tokens |
| Output price | $10.64 / 1M tokens |
| Context | 262,144 tokens |
| Capabilities | Streaming · Tools · JSON mode |
| Served via | streamlake (CN-region partner capacity) |
Cheaper 32K and 128K variants (streamlake/kat-coder-32k, streamlake/kat-coder-128k) are also live for smaller workloads.
Prices shown are launch-time figures; see each model page for the current billed rate.
Try it
curl https://api.therouter.ai/v1/chat/completions \
-H "Authorization: Bearer $THEROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "streamlake/kat-coder-256k",
"messages": [{"role": "user", "content": "Refactor this monorepo to use Vitest instead of Jest..."}],
"provider": {"only": ["streamlake"]}
}'