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 Fable 5.1 (Anthropic, 53.4).

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OpenAI led 11× Anthropic led 11× 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 Fable 5.1 · Anthropic 53.4 Aug 2026
GPT-6-astra · OpenAI 52.8 Aug 2026
Claude Opus 5 · Anthropic 50.7 Jul 2026
Claude Fable 5 · Anthropic 49.7 Jun 2026
Claude Opus 4.8 · Anthropic 42.0 May 2026
Claude Opus 4.7 · Anthropic 40.7 Apr 2026
GPT-5.4 · OpenAI 39.0 Mar 2026
GPT-5.3-codex · OpenAI 32.5 Feb 2026
Claude Opus 4.6 · Anthropic 31.9 Feb 2026
GPT-5.2 · OpenAI 30.4 Dec 2025
Claude Opus 4.5 · Anthropic 29.1 Nov 2025
Gemini 3 Pro Preview · Google 28.0 Nov 2025
GPT-5-codex · OpenAI 24.9 Sep 2025
GPT-5 · OpenAI 23.0 Aug 2025
Claude Opus 4.1 · Anthropic 22.8 Aug 2025
Kimi K2 Instruct · Open Source 22.0 Jul 2025
o3-pro · OpenAI 21.9 Jun 2025
o3 · OpenAI 20.2 Apr 2025
Claude 3.7 Sonnet · Anthropic 17.7 Feb 2025
o1 · OpenAI 15.2 Dec 2024
Claude 3.5 Haiku · Anthropic 8.9 Nov 2024
Claude 3 Opus · Anthropic 8.7 Mar 2024
GPT-4 · OpenAI 6.7 Jun 2023
GPT-3.5-turbo · OpenAI 5.5 Feb 2023

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