OpenAI fires back: GPT-5.1-Codex-Max (API) and GPT 5.1 Pro (ChatGPT)

**OpenAI** released **GPT-5.1-Codex-Max**, featuring compaction-native training, an "Extra High" reasoning mode, and claims of over 24-hour autonomous operation, showing significant performance gains on benchmarks like METR, CTF, and PaperBench. **Google's Gemini 3 Pro** demonstrates strong coding and reasoning capabilities, achieving new state-of-the-art results on SWE-bench Verified and WeirdML, with estimated model size between 5-10 trillion parameters. The AI coding agent ecosystem is rapidly evolving with integrations and tooling improvements from multiple companies. **Sam Altman** highlighted the significant improvements in GPT-5.1-Codex-Max. The news also covers educational offerings like ChatGPT for Teachers and multi-agent workflows involving Gemini 3, GPT-5.1-Codex-Max, and Claude Sonnet 4.5.