GPT-6 Max tops math/ML but has tiny context; Fable 5.1 still best for long agentic tasks
daniel_mac8 · x · 2026-09-07
MParakhin shared hands-on impressions of GPT-6 and Fable 5.1, with danielmac8 asking how the combo works in practice.
- GPT-6 Max is the best model ever in math/ML, beating 5.2 Pro; GPT-6 Pro has appeared in the Web interface
- But GPT-6 is severely hampered by its tiny context window — "like talking to the super-smart Dory"
- Fable 5.1 remains the best on long agentic tasks, still better at following instructions and finding elegant coding solutions
- danielmac8 speculates the common stack is GPT-6 in Codex plus Fable 5.1 via Claude Code CLI
Related event: GPT-6 Tops Math but Small Context Hurts Long Tasks(4 posts)→
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