Glimmer Index - Chess - Chess960 - Contested Move Accuracy: leaderboard
Move accuracy on contested Chess960 chess positions in Glimmer Index's fixed-engine evaluation, using the source's native 0–100 contested-move metric. Forced/uncontested moves are not treated as the same accuracy population. Exact chess-1 settings, provider, route, effort, engine analysis budget and contested-move/sample counts remain explicit; ratings and accuracy are correlated outcomes of the same games.
Metric: Contested-move accuracy (%). Source: glimmerindex.com. Saturation forecast: Rough model projection: around 2026. 15 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | GPT-6 Astra (Glimmer Index Run: codex-gpt-6-astra-medium;model=openai/gpt-6-astra;provider=codex;route=gpt-6-astra;effort=medium;precision=unreported) | 83.72 | |
| 2 | GPT-6.1 Sol (Glimmer Index Run: codex-gpt-6-1-sol-medium;model=openai/gpt-6.1-sol;provider=codex;route=gpt-6.1-sol;effort=medium;precision=unreported) | 83.6 | |
| 3 | Qwen 3.5 9B (Glimmer Index Run: local-qwen3-5-9b-none;model=alibaba/qwen3.5-9b;provider=ollama;route=qwen3.5:9b;effort=none;precision=unreported) | 83.48 | |
| 4 | Claude Fable 5.1 (Glimmer Index Run: claude-fable-5-1-medium;model=anthropic/claude-fable-5-1;provider=claude;route=claude-fable-5-1;effort=medium;precision=unreported) | 82.87 | |
| 5 | GPT-6 Sol (Glimmer Index Run: codex-gpt-6-sol-medium;model=openai/gpt-6-sol;provider=codex;route=gpt-6-sol;effort=medium;precision=unreported) | 81.61 | |
| 6 | Claude Sonnet 5.5 (Glimmer Index Run: claude-sonnet-5-5-medium;model=anthropic/claude-sonnet-5-5;provider=claude;route=claude-sonnet-5-5;effort=medium;precision=unreported) | 81.43 | |
| 7 | Claude Opus 5.5 (Glimmer Index Run: claude-opus-5-5-medium;model=anthropic/claude-opus-5-5;provider=claude;route=claude-opus-5-5;effort=medium;precision=unreported) | 81.15 | |
| 8 | GPT-6.1 Terra (Glimmer Index Run: codex-gpt-6-1-terra-medium;model=openai/gpt-6.1-terra;provider=codex;route=gpt-6.1-terra;effort=medium;precision=unreported) | 80.61 | |
| 9 | Gemma 3 4B (Glimmer Index Run: local-gemma-3-4b-none;model=google/gemma-3-4b;provider=ollama;route=gemma3:4b;effort=none;precision=unreported) | 80.39 | |
| 10 | GPT-OSS-20B (Glimmer Index Run: local-gpt-oss-20b-low;model=openai/gpt-oss-20b;provider=ollama;route=gpt-oss:20b;effort=low;precision=unreported) | 78.51 |
Interactive version: theaggregate.ai/benchmark?slug=glimmer-index-chess-chess960-contested-move-accuracy · How It Works · Data refreshed daily, snapshot 2026-11-05.