Frontier

The AI frontier over time

The single best-scoring model at every release across 2023 – 2026 — by the Artificial Analysis Intelligence Index — and how the labs leapfrog each other for the lead. The current best is Claude Opus 5 (Anthropic, 63.1).

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OpenAI led 12× Anthropic led 12× Open Source led 1× Google led 1×

Every time the frontier moved

Newest first. Each model set a new all-time-high Intelligence Index at its release.

Claude Opus 5 · Anthropic 63.1 Jul 2026
Claude Fable 5 · Anthropic 62.1 Jun 2026
Claude Opus 4.8 · Anthropic 57.3 May 2026
GPT-5.5 · OpenAI 56.3 Apr 2026
Claude Opus 4.7 · Anthropic 55.0 Apr 2026
GPT-5.4 · OpenAI 53.1 Mar 2026
Claude Sonnet 4.6 · Anthropic 48.4 Feb 2026
GPT-5.3-codex · OpenAI 45.5 Feb 2026
Claude Opus 4.6 · Anthropic 44.9 Feb 2026
GPT-5.2 · OpenAI 43.3 Dec 2025
Claude Opus 4.5 · Anthropic 41.9 Nov 2025
Gemini 3 Pro Preview · Google 40.6 Nov 2025
GPT-5.1 · OpenAI 37.5 Nov 2025
Claude Sonnet 4.5 · Anthropic 37.4 Sep 2025
GPT-5-codex · OpenAI 37.0 Sep 2025
GPT-5 · OpenAI 35.3 Aug 2025
Claude Opus 4.1 · Anthropic 34.5 Aug 2025
Kimi K2 Instruct · Open Source 33.5 Jul 2025
o3-pro · OpenAI 33.3 Jun 2025
o3 · OpenAI 31.1 Apr 2025
Claude 3.7 Sonnet · Anthropic 27.6 Feb 2025
o1 · OpenAI 23.9 Dec 2024
Claude 3.5 Haiku · Anthropic 12.2 Nov 2024
Claude 3 Opus · Anthropic 11.8 Mar 2024
GPT-4 · OpenAI 6.8 Jun 2023
GPT-3.5-turbo · OpenAI 3.2 Feb 2023

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