Where 25 OpenAI-Compatible APIs Disagree with OpenAI
This story is from 2026-09-09. It is preserved in the archive; the latest stories are on the live feed.
TL;DR Dozens of LLM providers advertise OpenAI-compatible APIs, but strict client SDKs frequently fail due to payload mismatches. Primary discrepancies center on streaming tool-call deltas, omitted chunk indices, conflicting finish_reason values, and non-standard usage accounting. Reasoning models…
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- 2026-09-09 14:44 · DEV Community — AI
Where 25 OpenAI-Compatible APIs Disagree with OpenAI