Purpose guide · Reasoning and research

Which AI models belong on a reasoning or research shortlist?

Catalog current through July 21, 2026

61 models

Five source-backed models whose Epoch records explicitly name reasoning, proof, or search work. This is a shortlist, not a performance ranking.

Selection rule

Included when the Epoch record explicitly lists mathematical reasoning, quantitative reasoning, theorem proving, proof generation, proof verification, or search. A matching label establishes task relevance only, not quality.

Task-fit shortlist

Evidence first. Your evaluation next.

Ordered by release date for readability, newest first. The order is not a score or recommendation.

  1. 01
    DeepSeek

    DeepSeekMath-V2

    Released November 27, 2025

    Matching evidence
    Mathematical reasoning · Theorem proving · Proof generation · Proof verification
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  2. 02
    Anthropic

    Claude Opus 4.5

    Released November 24, 2025

    Matching evidence
    Quantitative reasoning · Search · Mathematical reasoning
    Domain
    Language · Multimodal · Vision
    Access
    API access; closed weights
    Model source
  3. 03
    xAI

    Grok 4.1 Fast

    Released November 19, 2025

    Matching evidence
    Mathematical reasoning · Quantitative reasoning
    Domain
    Language
    Access
    API access; closed weights
    Model source
  4. 04
    xAI

    Grok 4.1

    Released November 17, 2025

    Matching evidence
    Mathematical reasoning · Quantitative reasoning
    Domain
    Language
    Access
    API access; closed weights
    Model source
  5. 05
    Moonshot AI

    Kimi K2 Thinking

    Released November 6, 2025

    Matching evidence
    Search · Quantitative reasoning
    Domain
    Language
    Access
    Open weights (restricted use); open weights
    Model source
  6. 06
    Alibaba

    Tongyi DeepResearch

    Released October 28, 2025

    Matching evidence
    Quantitative reasoning · Search
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  7. 07
    MiniMax

    MiniMax-M2

    Released October 27, 2025

    Matching evidence
    Search
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  8. 08
    Anthropic

    Claude Sonnet 4.5

    Released September 29, 2025

    Matching evidence
    Quantitative reasoning · Mathematical reasoning
    Domain
    Language · Vision · Multimodal
    Access
    API access; closed weights
    Model source
  9. 09
    Google

    Gemini Robotics-ER 1.5

    Released September 25, 2025

    Matching evidence
    Search
    Domain
    Vision · Language · Speech
    Access
    API access; closed weights
    Model source
  10. 10
    Alibaba

    AgentFounder-30B

    Released September 16, 2025

    Matching evidence
    Quantitative reasoning · Mathematical reasoning · Search
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  11. 11
    Alibaba

    Qwen3-Max

    Released September 5, 2025

    Matching evidence
    Mathematical reasoning · Quantitative reasoning
    Domain
    Language
    Access
    API access; closed weights
    Model source
  12. 12
    Anthropic

    Claude Opus 4.1

    Released August 5, 2025

    Matching evidence
    Search · Quantitative reasoning · Mathematical reasoning
    Domain
    Language · Multimodal · Vision
    Access
    API access; closed weights
    Model source
  13. 13
    Google

    Gemini 2.5 Deep Think

    Released August 1, 2025

    Matching evidence
    Mathematical reasoning
    Domain
    Language · Multimodal · Vision · Video · Audio · Mathematics
    Access
    Hosted access (no API); closed weights
    Model source
  14. 14
    Alibaba

    Qwen3-235B-A22B (Jul 2025)

    Released July 25, 2025

    Matching evidence
    Mathematical reasoning · Quantitative reasoning
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  15. 15
    Alibaba

    Qwen3-235B-A22B-Thinking (Jul 2025)

    Released July 25, 2025

    Matching evidence
    Mathematical reasoning · Quantitative reasoning
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  16. 16
    Moonshot AI

    Kimi K2

    Released July 11, 2025

    Matching evidence
    Quantitative reasoning · Search
    Domain
    Language
    Access
    Open weights (restricted use); open weights
    Model source
  17. 17
    xAI

    Grok 4 Heavy

    Released July 10, 2025

    Matching evidence
    Mathematical reasoning · Quantitative reasoning
    Domain
    Language
    Access
    Unreleased; closed weights
    Model source
  18. 18
    xAI

    Grok 4

    Released July 9, 2025

    Matching evidence
    Search · Quantitative reasoning
    Domain
    Language · Multimodal · Vision
    Access
    API access; closed weights
    Model source
  19. 19
    Google

    Gemini 2.5 Pro (Jun 2025)

    Released June 5, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Language · Vision · Video · Multimodal · Speech
    Access
    API access; closed weights
    Model source
  20. 20
    DeepSeek

    DeepSeek-R1 (May 2025)

    Released May 28, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  21. 21
    Anthropic

    Claude Opus 4

    Released May 22, 2025

    Matching evidence
    Quantitative reasoning · Search · Mathematical reasoning
    Domain
    Language · Multimodal · Vision
    Access
    API access; closed weights
    Model source
  22. 22
    Anthropic

    Claude Sonnet 4

    Released May 22, 2025

    Matching evidence
    Quantitative reasoning · Search · Mathematical reasoning
    Domain
    Language · Multimodal · Vision
    Access
    API access; closed weights
    Model source
  23. 23
    Google

    Gemini 2.5 Pro (May 2025)

    Released May 6, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Language · Vision · Video · Multimodal · Speech
    Access
    API access; closed weights
    Model source
  24. 24
    Alibaba

    Qwen3-235B-A22B

    Released April 29, 2025

    Matching evidence
    Mathematical reasoning · Quantitative reasoning
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  25. 25
    Meta

    Llama 4 Behemoth (preview)

    Released April 5, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Multimodal · Language · Vision
    Access
    Unreleased; closed weights
    Model source
  26. 26
    Google

    Gemini 2.5 Pro (Mar 2025)

    Released March 25, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Language · Vision · Video · Multimodal · Speech
    Access
    API access; closed weights
    Model source
  27. 27
    DeepSeek

    DeepSeek-V3 (Mar 2025)

    Released March 24, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    Open weights (restricted use); open weights
    Model source
  28. 28
    OpenAI

    o1-pro

    Released March 19, 2025

    Matching evidence
    Quantitative reasoning · Mathematical reasoning
    Domain
    Language · Mathematics · Multimodal
    Access
    API access; closed weights
    Model source
  29. 29
    Baidu

    ERNIE-4.5-VL-424B-A47B (文心大模型4.5)

    Released March 16, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Multimodal · Language · Vision · Video
    Access
    Open weights (unrestricted); open weights
    Model source
  30. 30
    Tencent

    Hunyuan-TurboS

    Released March 11, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    API access; closed weights
    Model source
  31. 31
    Alibaba

    QwQ-32B

    Released March 6, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  32. 32
    OpenAI

    GPT-4.5

    Released February 27, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Language · Vision · Multimodal
    Access
    API access; closed weights
    Model source
  33. 33
    Anthropic

    Claude 3.7 Sonnet

    Released February 24, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Language · Vision · Multimodal
    Access
    API access; closed weights
    Model source
  34. 34
    OpenAI

    o3-mini

    Released January 31, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    API access; closed weights
    Model source
  35. 35
    Moonshot AI

    Kimi k1.5

    Released January 22, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Multimodal · Language · Vision
    Access
    API access; closed weights
    Model source
  36. 36
    DeepSeek

    DeepSeek-R1

    Released January 20, 2025

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  37. 37
    DeepSeek

    DeepSeek-V3

    Released December 24, 2024

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    Open weights (restricted use); open weights
    Model source
  38. 38
    OpenAI

    o3

    Released December 20, 2024

    Matching evidence
    Quantitative reasoning · Search
    Domain
    Language · Vision · Multimodal
    Access
    API access; closed weights
    Model source
  39. 39
    OpenAI

    o1

    Released December 5, 2024

    Matching evidence
    Quantitative reasoning · Mathematical reasoning
    Domain
    Language · Mathematics · Multimodal
    Access
    API access; closed weights
    Model source
  40. 40
    Mistral

    Pixtral Large

    Released November 18, 2024

    Matching evidence
    Mathematical reasoning
    Domain
    Multimodal · Language · Vision
    Access
    Open weights (non-commercial); open weights
    Model source
  41. 41
    Moonshot AI

    k0-math

    Released November 16, 2024

    Matching evidence
    Mathematical reasoning · Quantitative reasoning
    Domain
    Mathematics · Language
    Access
    Unreleased; closed weights
    Model source
  42. 42
    NVIDIA

    NVLM-D 72B

    Released October 22, 2024

    Matching evidence
    Quantitative reasoning
    Domain
    Vision · Language
    Access
    Open weights (non-commercial); open weights
    Model source
  43. 43
    NVIDIA

    NVLM-H 72B

    Released October 22, 2024

    Matching evidence
    Quantitative reasoning
    Domain
    Vision · Language
    Access
    Unreleased; closed weights
    Model source
  44. 44
    NVIDIA

    NVLM-X 72B

    Released October 22, 2024

    Matching evidence
    Quantitative reasoning
    Domain
    Vision · Language
    Access
    Unreleased; closed weights
    Model source
  45. 45
    Alibaba

    Qwen2.5 Instruct (72B)

    Released September 19, 2024

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    Open weights (restricted use); open weights
    Model source
  46. 46
    Alibaba

    Qwen2.5-72B

    Released September 19, 2024

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  47. 47
    Alibaba

    Qwen2.5-32B

    Released September 17, 2024

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  48. 48
    OpenAI

    o1-mini

    Released September 12, 2024

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    API access; closed weights
    Model source
  49. 49
    OpenAI

    o1-preview

    Released September 12, 2024

    Matching evidence
    Quantitative reasoning
    Domain
    Language · Mathematics · Biology
    Access
    API access; closed weights
    Model source
  50. 50
    Meta

    Llama 3.1-405B

    Released July 23, 2024

    Matching evidence
    Mathematical reasoning
    Domain
    Language
    Access
    Open weights (restricted use); open weights
    Model source
  51. 51
    Mistral

    Mathstral

    Released July 16, 2024

    Matching evidence
    Mathematical reasoning · Quantitative reasoning
    Domain
    Mathematics · Language
    Access
    Open weights (unrestricted); open weights
    Model source
  52. 52
    Z.ai

    GLM-4 (0520)

    Released May 20, 2024

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    API access; closed weights
    Model source
  53. 53
    Alibaba

    Qwen1.5-72B

    Released February 4, 2024

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    Open weights (restricted use); open weights
    Model source
  54. 54
    Mistral

    Mixtral 8x7B

    Released December 11, 2023

    Matching evidence
    Quantitative reasoning
    Domain
    Language
    Access
    Open weights (unrestricted); open weights
    Model source
  55. 55
    Meta

    Galactica

    Released November 16, 2022

    Matching evidence
    Mathematical reasoning
    Domain
    Language · Biology
    Access
    Open weights (non-commercial); open weights
    Model source
  56. 56
    Google

    Flan-PaLM 540B

    Released October 20, 2022

    Matching evidence
    Mathematical reasoning
    Domain
    Language
    Access
    Unreleased; closed weights
    Model source
  57. 57
    Google

    U-PaLM (540B)

    Released October 20, 2022

    Matching evidence
    Mathematical reasoning · Quantitative reasoning
    Domain
    Language
    Access
    Unreleased; closed weights
    Model source
  58. 58
    Google

    Minerva (540B)

    Released June 29, 2022

    Matching evidence
    Quantitative reasoning · Mathematical reasoning
    Domain
    Language
    Access
    Unreleased; closed weights
    Model source
  59. 59
    OpenAI

    Statement Curriculum Learning

    Released March 2, 2022

    Matching evidence
    Mathematical reasoning
    Domain
    Language · Mathematics
    Access
    API access; closed weights
    Model source
  60. 60
    Microsoft

    MEB

    Released September 4, 2021

    Matching evidence
    Search
    Domain
    Search · Language
    Access
    Hosted access (no API); closed weights
    Model source
  61. 61
    Microsoft

    RankNet

    Released August 7, 2005

    Matching evidence
    Search
    Domain
    Search
    Access
    Unreleased; closed weights
    Model source

Decision criteria

Questions the source can help you ask.

These checks narrow an evaluation plan. They do not replace hands-on testing.

01

Research retrieval or analysis?

Search appears as an explicit task for only one model on this shortlist. For every other model, retrieval tooling and citation behavior require separate verification.

02

General reasoning or formal proof?

Use the task labels to distinguish quantitative reasoning from theorem and proof work. Do not assume one label covers the other.

03

What must you test yourself?

Evaluate factual accuracy, source fidelity, calibration, tool use, latency, context handling, and cost on your own workload. This catalog does not measure them.

Evidence boundary

What this guide does not know.

No task-level quality, price, context window, latency, or reliability measurement is present in the Epoch catalog. We therefore publish no ranking or “best” label.

Catalog source: Epoch AI Data on AI Models, retrieved 2026-07-21, CC-BY. Artifact sha256:80ad08198183693101ceb246a5ea272d64c06c147fc41f72cca8526b32483424.

Each listed model links to its model-level source above. See the publication source ledger and methodology for the wider evidence policy.