Best OpenAI Models for Agents

AI models ranked by the Artificial Analysis Agentic Index — measuring multi-step tool use, planning and task completion (including Tau²-Bench). The best models for building autonomous agents and agentic workflows.

1. 1O
   gpt-5.5

   ReasoningToolsJSON+156.7 intel · $5.00/M · 36 t/s
   69.4

   Agentic
2. 2O
   gpt-5.4

   ReasoningToolsJSON+156.8 intel · $2.50/M · 40 t/s
   68.0

   Agentic
3. 3O
   gpt-5.3-codex

   ReasoningToolsJSON+153.6 intel · $1.75/M · 50 t/s
   60.5

   Agentic
4. 4O
   gpt-5.2-codex

   ReasoningToolsJSON+149.0 intel · $1.75/M · 49 t/s
   56.5

   Agentic
5. 5O
   gpt-5.2

   ReasoningToolsJSON+146.6 intel · $1.75/M · 42 t/s
   54.9

   Agentic
6. 6O
   gpt-5-codex

   ReasoningToolsJSON+144.6 intel · $1.25/M · 61 t/s
   52.7

   Agentic
7. 7O
   gpt-5.1

   ReasoningToolsJSON+147.7 intel · $1.25/M · 50 t/s
   51.3

   Agentic
8. 8O
   gpt-5.1-codex

   ReasoningToolsJSON+143.1 intel · $1.25/M · 39 t/s
   50.7

   Agentic
9. 9O
   gpt-5.4-nano

   ReasoningToolsJSON+144.0 intel · $0.200/M · 63 t/s
   47.6

   Agentic
10. 10O
    gpt-5

    ReasoningToolsJSON+142.0 intel · $1.25/M · 56 t/s
    45.8

    Agentic
11. 11O
    gpt-5-mini

    ReasoningToolsJSON+138.9 intel · $0.250/M · 66 t/s
    40.9

    Agentic
12. 12O
    gpt-5.1-codex-mini

    ReasoningToolsJSON+138.6 intel · $0.250/M · 135 t/s
    38.7

    Agentic
13. 13O
    gpt-oss-120b:free

    ReasoningTools33.3 intel · Free/M · 281 t/s
    37.9

    Agentic
14. 14O
    gpt-oss-120b

    ReasoningToolsJSON33.3 intel · $0.039/M · 281 t/s
    37.9

    Agentic
15. 15O
    o3

    ReasoningToolsJSON+138.4 intel · $2.00/M · 67 t/s
    36.1

    Agentic
16. 16O
    o4-mini

    ReasoningToolsJSON+133.1 intel · $1.10/M · 67 t/s
    36.1

    Agentic
17. 17O
    gpt-oss-20b:free

    ReasoningTools24.5 intel · Free/M · 131K ctx
    27.6

    Agentic
18. 18O
    gpt-oss-20b

    ReasoningToolsJSON24.5 intel · $0.029/M · 344 t/s
    27.6

    Agentic
19. 19O
    gpt-4.1

    ToolsJSONVision26.3 intel · $2.00/M · 48 t/s
    27.3

    Agentic
20. 20O
    gpt-4.1-mini

    ToolsJSONVision22.9 intel · $0.400/M · 47 t/s
    25.2

    Agentic
21. 21O
    gpt-5.4-mini

    ReasoningToolsJSON+123.3 intel · $0.750/M · 72 t/s
    25.0

    Agentic
22. 22O
    o3-mini-high

    ReasoningToolsJSON25.2 intel · $1.10/M · 200K ctx
    20.9

    Agentic
23. 23O
    gpt-5-nano

    ReasoningToolsJSON+125.9 intel · $0.050/M · 91 t/s
    16.8

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

    ToolsJSONVision18.6 intel · $2.50/M · 23 t/s
    9.7

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

    ToolsJSONVision17.3 intel · $2.50/M · 64 t/s
    8.4

    Agentic