GPT-5.2 and GPT-5.2-Codex are now 40% faster

twitter.com

February 4, 2026

1 min read

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45/100

Summary

GPT-5.2 and GPT-5.2-Codex are now 40% faster due to optimizations in the inference stack for all API customers. The models maintain the same architecture and weights while offering lower latency.

Key Takeaways

GPT-5.2 and GPT-5.2-Codex are now 40% faster than previous versions.
OpenAI has optimized its inference stack for all API customers, resulting in lower latency.
The model architecture and weights remain unchanged despite the performance improvements.

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Coverage & discussions

Hacker News · twitter.com

GPT-5.2 and GPT-5.2-Codex are now 40% faster ↗

Community discussions

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Analysis ready

Community Sentiment

Mixed

Positives

The 40% faster inference in GPT-5.2 significantly boosts productivity, with users reporting up to 3x improvement in their workflow.
OpenAI's introduction of subagents and a better multi-agent interface enhances the usability of Codex, making it more effective for developers.

Concerns

There are concerns that OpenAI may sacrifice model quality for speed, leading to skepticism about the reliability of their performance claims.
The perception that initial model performance is artificially inflated raises doubts about the long-term effectiveness of the new features.