OpenAI
Previous OpenAI frontier release retained for compatibility after GPT-5.6. It supports a 1M-token context window, advanced tool use, and strong long-horizon reasoning, coding, and professional workflows.
61.5
Quality Score
1277
Arena ELO
1M
Parameters
1M
Context
This measures the amount of verifiable public evidence we have, not how capable the model is. A missing field means it has not been verified yet, not that its value is zero.
17 of 22 public signals
Use this section to answer one simple question first: how much outside evidence do we have that this model performs well? Structured benchmark scores appear first, then official provider evidence, then live arena signal.
This model has normalized benchmark rows, so scores here are directly comparable across benchmark sources.
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Apr 2026
Released
4/5 signals
4/4 signals
5/5 signals
1/4 signals
3/4 signals
Parameters
—
Training compute
Not reported
Dataset scale
Not reported
Base model
Not reported
Source-reported access: API access · Likely confidence
Gaps we are still tracking
These are recent benchmark or leaderboard claims from official provider sources. They are useful for freshness and context, but they are not treated the same as normalized independent benchmark rows.
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View source1277
ELO Score
1268 - 1286
95% Confidence
+/-9 points
7.2K
Battles
Aug 25, 2026
Last Updated