Tutorials Intermediate
DeepSeek V4-Flash: Fix the reasoning_content 400 Trap
Build a thinking-mode tool-calling agent on DeepSeek V4-Flash-0731 without the 400 error.
10 min read·Kodetra Technologies
3d agoHow-to content for builders, indie hackers, and AI engineers. Less theory, more shipped code.
Tutorials Build a thinking-mode tool-calling agent on DeepSeek V4-Flash-0731 without the 400 error.
Tutorials Prefill Kimi K3's assistant turn to lock output shape, force clean JSON, and steer tone.
Tutorials Cut MCP agent context up to 99% by exposing tools as a code API the model calls in code.
Tutorials Use speed:"fast" on Claude Opus 4.8 for up to 2.5x faster output, with a safe rate-limit fallback.
Tutorials Install grok-build-0.1, run plan mode, stream JSON in CI, and call the API from Python.