Smartest OpenAI Models

The most capable AI models ranked by the Artificial Analysis Intelligence Index — a composite of reasoning, knowledge, math and science benchmarks. These are the highest-scoring large language models available today.

1. 1O
   gpt-5.4

   ReasoningToolsJSON+1$2.50/M · 62 t/s · 982ms ttft
   56.8

   Intelligence
2. 2O
   gpt-5.5

   ReasoningToolsJSON+1$5.00/M · 36 t/s · 2.8s ttft
   56.7

   Intelligence
3. 3O
   gpt-5.3-codex

   ReasoningToolsJSON+1$1.75/M · 53 t/s · 4.2s ttft
   53.6

   Intelligence
4. 4O
   gpt-5.2-codex

   ReasoningToolsJSON+1$1.75/M · 63 t/s · 1.5s ttft
   49.0

   Intelligence
5. 5O
   gpt-5.1

   ReasoningToolsJSON+1$1.25/M · 67 t/s · 1.0s ttft
   47.7

   Intelligence
6. 6O
   gpt-5-codex

   ReasoningToolsJSON+1$1.25/M · 43 t/s · 3.6s ttft
   44.6

   Intelligence
7. 7O
   gpt-5.4-nano

   ReasoningToolsJSON+1$0.200/M · 60 t/s · 552ms ttft
   44.0

   Intelligence
8. 8O
   gpt-5.1-codex

   ReasoningToolsJSON+1$1.25/M · 79 t/s · 2.8s ttft
   43.1

   Intelligence
9. 9O
   gpt-5

   ReasoningToolsJSON+1$1.25/M · 53 t/s · 655ms ttft
   42.0

   Intelligence
10. 10O
    gpt-5-mini

    ReasoningToolsJSON+1$0.250/M · 70 t/s · 729ms ttft
    41.2

    Intelligence
11. 11O
    gpt-5.1-codex-mini

    ReasoningToolsJSON+1$0.250/M · 127 t/s · 1.7s ttft
    38.6

    Intelligence
12. 12O
    o3

    ReasoningToolsJSON+1$2.00/M · 200K ctx
    38.4

    Intelligence
13. 13O
    gpt-5.2

    ReasoningToolsJSON+1$1.75/M · 48 t/s · 2.5s ttft
    33.6

    Intelligence
14. 14O
    gpt-oss-120b:free

    ReasoningToolsFree/M · 547 t/s · 177ms ttft
    33.3

    Intelligence
15. 15O
    gpt-oss-120b

    ReasoningToolsJSON$0.039/M · 547 t/s · 177ms ttft
    33.3

    Intelligence
16. 16O
    o4-mini

    ReasoningToolsJSON+1$1.10/M · 122 t/s · 4.5s ttft
    33.1

    Intelligence
17. 17O
    gpt-4.1

    ToolsJSONVision$2.00/M · 54 t/s · 696ms ttft
    26.3

    Intelligence
18. 18O
    gpt-5-nano

    ReasoningToolsJSON+1$0.050/M · 400K ctx
    25.9

    Intelligence
19. 19O
    o3-mini-high

    ReasoningToolsJSON$1.10/M · 200K ctx
    25.2

    Intelligence
20. 20O
    gpt-oss-20b:free

    ReasoningToolsJSONFree/M · 391 t/s · 247ms ttft
    24.5

    Intelligence
21. 21O
    gpt-oss-20b

    ReasoningToolsJSON$0.029/M · 391 t/s · 247ms ttft
    24.5

    Intelligence
22. 22O
    gpt-5.4-mini

    ReasoningToolsJSON+1$0.750/M · 83 t/s · 728ms ttft
    23.3

    Intelligence
23. 23O
    gpt-4.1-mini

    ToolsJSONVision$0.400/M · 45 t/s · 689ms ttft
    22.9

    Intelligence
24. 24O
    gpt-4o-2024-08-06

    ToolsJSONVision$2.50/M · 84 t/s · 722ms ttft
    18.6

    Intelligence
25. 25O
    gpt-4o-2024-11-20

    ToolsJSONVision$2.50/M · 46 t/s · 539ms ttft
    17.3

    Intelligence