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AI model history

What was the top AI model in ?

Claude 4 Opus from Anthropic, scoring 20.6 on the Intelligence Index at $30 per million tokens. It had been on top for 9 days.

Top Intelligence Index score on each day. Click anywhere to go there.

Leaderboard

The top 10 on May 31, 2025

Ranked by the Artificial Analysis Intelligence Index, with each model's price on that day (per million tokens, 3 parts input to 1 part output).

  1. 1
    Claude 4 OpusClosed
    Anthropic · released May 22, 2025 · 9 days old
    Intelligence 20.6
    $30 /M
  2. 2
    o3Closed
    OpenAI · released Apr 16, 2025 · 6 weeks old
    Intelligence 20.2
    $18 /Mnow $3.50
  3. 3
    Claude 4 SonnetClosed
    Anthropic · released May 22, 2025 · 9 days old
    Intelligence 18.9
    $6 /M
  4. 4
    Claude 3.7 SonnetClosed
    Anthropic · released Feb 24, 2025 · 3 months old
    Intelligence 17.7
    $6 /M
  5. 5
    o4-miniClosed
    OpenAI · released Apr 16, 2025 · 6 weeks old
    Intelligence 16.7
    $1.93 /M
  6. 6
    o1Closed
    OpenAI · released Dec 5, 2024 · 6 months old
    Intelligence 15.2
    $26 /M
  7. 7
    Gemini 2.5 Pro Preview (Mar' 25)Closed
    Google · released Mar 25, 2025 · 2 months old
    Intelligence 15
    No public price
  8. 8
    Grok 3 mini ReasoningClosed
    xAI · released Feb 19, 2025 · 3 months old
    Intelligence 14.6
    $0.35 /M
  9. 9
    Gemini 2.5 Pro Preview (May' 25)Closed
    Google · released May 6, 2025 · 4 weeks old
    Intelligence 14.5
    $3.44 /M
  10. 10
    Gemini 2.5 FlashClosed
    Google · released May 20, 2025 · 11 days old
    Intelligence 13.1
    $0.85 /M

17 months later

What has happened since

#133Where Claude 4 Opus ranks today

330 models have come out since. Today's best is Claude Opus 5.5 at 57.6, 37 points higher.

300×Cheaper for the same score

Hy3-preview scores at least as well today for $0.10 per million tokens, against $30 for Claude 4 Opus back then.

2 monthsUntil it cost under $1

GPT-5 mini matched it for $0.69 per million tokens on Aug 7, 2025.

5 monthsUntil open weights caught up

Kimi K2 Thinking from Kimi matched it on Nov 6, 2025, free to download and run.

The race

Which lab held the top spot

OpenAI led for 2.5 years of the 4 years since ChatGPT launched. Anthropic has held #1 since Apr 16, 2026, 6 models in a row. We rank by the Artificial Analysis Intelligence Index. Other leaderboards, such as LMArena's human votes, crown different models.

  • OpenAI65%2.5 years at #1 across 12 models. Longest: GPT-4, 8 months.
  • Anthropic33%15 months at #1 across 11 models. Longest: Claude 3 Opus, 6 months.
  • xAI2%4 weeks at #1 across 1 model. Longest: Grok 4, 4 weeks.
  • Google<1%6 days at #1 across 1 model. Longest: Gemini 3 Pro Preview, 6 days.

The wider field

170 models were out on May 31, 2025

Best open model
DeepSeek R1 0528 (May '25)

DeepSeek, scoring 13.1. #11 overall, 7.5 points behind.

Best under $1 per million
Grok 3 mini Reasoning

xAI, scoring 14.6. #8 overall at $0.35, 85× cheaper than #1.

New in the 30 days before · 12
  • DeepSeek R1 0528 Qwen3 8B8.1
  • DeepSeek R1 0528 (May '25)13.1
  • Sarvam M5.3
  • Claude 4 Opus20.6
  • Claude 4 Sonnet18.9
  • Devstral Small (May '25)8.7
and 6 more

Browse

The top AI model, month by month

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Try today's top models on your own prompt

Scores tell you who leads on average. Send one prompt to up to six models and see which answer you'd actually use, with what each one cost. For the long view of prices, read Six months later, the best AI costs 20× less.

Compare models

Scores and release dates from Artificial Analysis (Intelligence Index, best published effort of each model), data through October 18, 2026. Prices are list prices on the day, including later cuts we know of. Models without a public price are ranked but not priced.