OpenAI Codex 0.148.0 breaks gpt-5.6-sol by sending unsupported parameter
samkarazi · ghdev · 2026-08-19
A user reported that OpenAI Codex CLI v0.148.0 causes all requests using the gpt-5.6-sol model to fail. Error logs indicate the client sends the promptcacheretention parameter, which is not supported by this model. Log comparisons confirm that under identical environments and configurations, v0.147.0 worked fine, while failures began immediately after updating to v0.148.0. The issue suggests the client should conditionally send this parameter based on the model capabilities.
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