A detailed look at GPT-6 Astra's rollout, agent capabilities, 1.05M context window, real pricing, Responses API usage, and migration requirements.
Construct an offline GPT-5.6 Responses API workflow with explicit reasoning, narrow tools, usage capture, and a recorded cost baseline.
Use a fixed GPT-5.5 snapshot in a controlled Responses API tool loop with reasoning policy, validation, idempotent execution, and recoverable checkpoints.
Evaluate Mistral Small 4 for constrained tool routing while accounting for open weights, configurable reasoning, strict validation, and its real infrastructure floor.