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.
OpenRouter
Price record: 2026-10-03. Source: openrouter.
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Quality Score
1276
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.
16 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
3/4 signals
5/5 signals
1/4 signals
3/4 signals
Parameters
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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.
Introducing GPT-5.5
Learn about OpenAI’s latest model: GPT-6 Compare models (opens in a new window) Loading… Share Model capabilities Model capabilities Agentic coding Knowledge work Scientific research Next-generation inference efficiency Advancing cybersecurity for everyone’s safety Availability and pricing Evaluations Model capabilities Agentic coding Knowledge work Scientific research Next-generation inference efficiency Advancing cybersecurity for everyone’s safety Availability and pricing
View sourceIntroducing GPT‑5 for developers
Introducing GPT‑5 for developers | OpenAI Skip to main content Research Products Business Developers Company Foundation (opens in a new window) Log in Try ChatGPT (opens in a new window) Research Products Business Developers Company Foundation (opens in a new window) Try ChatGPT (opens in a new window) Login OpenAI August 7, 2025 Product Introducing GPT‑5 for developers The best model for coding and agentic tasks. Loading… Share Introduction Introduction Coding Frontend engin
View sourcegpt5.5 - GAIA
GAIA score 78.4 from abcdagent v26.09.17_v3
View source1276
ELO Score
1267 - 1285
95% Confidence
+/-9 points
7.6K
Battles
Oct 3, 2026
Last Updated