Best Reasoning AI Models in 2026

Top AI models with dedicated reasoning capabilities, ranked by benchmark performance.

GPT-5.4
OpenAIProprietary1M

88

overall

GPT-5.3 Codex
OpenAIProprietary400K

85

overall

GPT-5.2
OpenAIProprietary400K

83

overall

4
GPT-5.2-Codex
OpenAIProprietary400K

82

overall

5
Gemini 3 Pro Deep Think
GoogleProprietary2M

81

overall

6
GPT-5.1-Codex-Max
OpenAIProprietary400K

77

overall

7
GPT-5.1
OpenAIProprietary400K

76

overall

8
GLM-5 (Reasoning)
Zhipu AIOpen Weight200K

75

overall

9
GPT-5 (high)
OpenAIProprietary128K

72

overall

10
o1-preview
OpenAIProprietary200K

71

overall

11
Kimi K2.5 (Reasoning)
Moonshot AIOpen Weight128K

71

overall

12
GPT-5 (medium)
OpenAIProprietary128K

70

overall

13
Qwen3.5 397B (Reasoning)
AlibabaOpen Weight128K

70

overall

14
DeepSeek V3.2 (Thinking)
DeepSeekOpen Weight128K

69

overall

15
GPT-5 mini
OpenAIProprietary128K

68

overall

16
o3-pro
OpenAIProprietary200K

68

overall

17
o3
OpenAIProprietary200K

67

overall

18
GLM-4.7
Zhipu AIOpen Weight200K

67

overall

19
DeepSeekMath V2
DeepSeekOpen Weight128K

64

overall

20
MiMo-V2-Flash
XiaomiOpen Weight128K

63

overall

21
Nemotron 3 Ultra 500B
NVIDIAOpen Weight32K

60

overall

22
GLM-4.7-Flash
Zhipu AIOpen Weight200K

56

overall

23
Nemotron Ultra 253B
NVIDIAOpen Weight32K

40

overall

24
DeepSeek-R1
DeepSeekOpen Weight128K

35

overall

25
Qwen3 235B 2507 (Reasoning)
AlibabaOpen Weight128K

31

overall

26
Claude 4.1 Opus Thinking
AnthropicProprietary200K

29

overall

27
DeepSeek V3.1 (Reasoning)
DeepSeekOpen Weight128K

25

overall

Key Takeaways

  • The top model is GPT-5.4 by OpenAI with a score of 88.
  • The best open-weight model in this ranking is GLM-5 (Reasoning) at position #8.
  • 27 models are included in this ranking.