# Best AI model for long context — October 2026

As of Oct 14, 2026, Gemini 4 Argon & Claude Opus 5.5 are tied for state of the art in Long context (since Oct 2, 2026; sources LMArena Text (style-controlled, longer query); methodology v1.0).

Category board: https://isitsota.com/c/long-context

## Top 10

- #1 Gemini 4 Argon
- #1 Claude Opus 5.5
- #2 Claude Opus 4.6
- #3 Claude Fable 5
- #4 Claude Opus 4.7
- #5 Gemini 3.8 Flash
- #6 Claude Fable 5.1
- #7 Muse Wonder
- #8 Kimi K3
- #9 Claude Opus 5

## Crown changes

- Oct 2, 2026 — Long context: Gemini 4 Argon and Claude Opus 5.5 are co-SOTA
- Sep 11, 2026 — Long context: Claude Opus 4.6 and Claude Fable 5 and Claude Fable 5.1 and Claude Opus 4.7 and Gemini 3.8 Flash are co-SOTA
- Aug 19, 2026 — Long context: Claude Opus 4.6 and Claude Fable 5 and Claude Opus 4.7 are co-SOTA

## Weights

- Fiction.liveBench 120k: primary, weight 1
- LMArena Text (style-controlled, longer query): primary, weight 0.7