ModelCompare
Compare

AI model history

What was the top AI model on ?

GPT-5.3 Codex from OpenAI, scoring 32.5 on the Intelligence Index at $4.81 per million tokens. It came out that very day.

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

Leaderboard

The top 10 on February 5, 2026

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
    GPT-5.3 CodexClosed
    OpenAI · released Feb 5, 2026 · out that day
    Intelligence 32.5
    $4.81 /M
  2. 2
    Claude Opus 4.6Closed
    Anthropic · released Feb 5, 2026 · out that day
    Intelligence 31.9
    $10 /M
  3. 3
    GPT-5.2Closed
    OpenAI · released Dec 11, 2025 · 8 weeks old
    Intelligence 30.4
    $4.81 /M
  4. 4
    Claude Opus 4.5Closed
    Anthropic · released Nov 24, 2025 · 2 months old
    Intelligence 29.1
    $10 /M
  5. 5
    GPT-5.2 CodexClosed
    OpenAI · released Dec 11, 2025 · 8 weeks old
    Intelligence 28.5
    $4.81 /M
  6. 6
    Gemini 3 Pro PreviewClosed
    Google · released Nov 18, 2025 · 3 months old
    Intelligence 28
    $4.50 /M
  7. 7
    Gemini 3 Flash PreviewClosed
    Google · released Dec 17, 2025 · 7 weeks old
    Intelligence 26.3
    $1.12 /M
  8. 8
    GPT-5 CodexClosed
    OpenAI · released Sep 23, 2025 · 4 months old
    Intelligence 24.9
    $3.44 /M
  9. 9
    GPT-5.1Closed
    OpenAI · released Nov 13, 2025 · 3 months old
    Intelligence 24.7
    $3.44 /M
  10. 10
    GPT-5.1 CodexClosed
    OpenAI · released Nov 13, 2025 · 3 months old
    Intelligence 23.7
    $3.44 /M

8 months later

What has happened since

#54Where GPT-5.3 Codex ranks today

176 models have come out since. Today's best is Claude Opus 5.5 at 57.6, 25.1 points higher.

30×Cheaper for the same score

Agnes 2.5 Pro Beta scores at least as well today for $0.15 per million tokens, against $4.81 for GPT-5.3 Codex back then.

6 monthsUntil it cost under $1

GPT-5.6 Luna matched it for $0.45 per million tokens on Jul 30, 2026.

4 monthsUntil open weights caught up

GLM-5.2 from Z.ai matched it on Jun 16, 2026, 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

324 models were out on Feb 5, 2026

Best open model
Kimi K2.5

Kimi, scoring 23.5. #11 overall, 9 points behind.

Best under $1 per million
DeepSeek V3.2

DeepSeek, scoring 21.5. #18 overall at $0.32, 15× cheaper than #1.

New in the 30 days before · 11
  • GPT-5.3 Codex32.5
  • Claude Opus 4.631.9
  • Qwen3 Coder Next9.2
  • Step 3.5 Flash16.6
  • LongCat Flash Lite11.5
  • Kimi K2.523.5
and 5 more

Browse

The top AI model, month by month

2026
2025
2024
2023
2022

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.