K2 Horizon 375B A23B

Composite indexes

• Artificial Analysis Intelligence Index#38 of 142
  31independentIntelligence Index v4.3; reasoningArtificial Analysis: K2 Horizon 375B A23B ↗

  Leader: Claude Opus 5.5 at 58

Coding

• SciCode#62 of 94
  42.9%independentreasoningArtificial Analysis: K2 Horizon 375B A23B ↗
  42.7%vendorHugging Face: IFM/K2-Horizon-375B-A23B model card ↗

  Leader: Claude Opus 5.5 at 66.9%

• Terminal-Bench 4.0#42 of 88
  1.5%independentreasoningArtificial Analysis: K2 Horizon 375B A23B ↗

  Leader: Claude Mythos 5.1 at 60.9%

• Terminal-Bench 2.x#33 of 103
  71.9%independentTerminal-Bench 2.1; reasoningArtificial Analysis: K2 Horizon 375B A23B ↗
  70.2%vendorTerminal-Bench 2.1Hugging Face: IFM/K2-Horizon-375B-A23B model card ↗

  Leader: Claude Fable 5.1 at 91.4%

• SWE-bench Pro#28 of 31
  42.6%vendorstrict (no internet)Hugging Face: IFM/K2-Horizon-375B-A23B model card ↗

  Leader: Claude Opus 5.5 at 89.9%

Agents and tool use

• GDPval-AA#34 of 103
  1441vendorvendor-runHugging Face: IFM/K2-Horizon-375B-A23B model card ↗
  1349independentreasoningArtificial Analysis: K2 Horizon 375B A23B ↗

  Leader: Claude Opus 5.5 at 1846

• BrowseComp#9 of 14
  72.8%vendorDiscard-all@95k context managementHugging Face: IFM/K2-Horizon-375B-A23B model card ↗

  Leader: GPT-6 Astra at 91.5%

Reasoning and knowledge

• GPQA Diamond#49 of 142
  87.3%independentreasoningArtificial Analysis: K2 Horizon 375B A23B ↗
  87.3%vendorHugging Face: IFM/K2-Horizon-375B-A23B model card ↗

  Leader: GPT-6 Astra at 96.1%

• Humanity’s Last Exam#54 of 147
  32%independentno tools; reasoningArtificial Analysis: K2 Horizon 375B A23B ↗
  32%vendorno toolsHugging Face: IFM/K2-Horizon-375B-A23B model card ↗

  Leader: Claude Opus 5.5 at 61.4%

• CritPt#51 of 139
  8.6%vendorHugging Face: IFM/K2-Horizon-375B-A23B model card ↗
  4.6%independentreasoningArtificial Analysis: K2 Horizon 375B A23B ↗

  Leader: GPT-5.6 Sol at 32.3%

Vision and long context

• AA Long Context Reasoning#32 of 139
  80%independentreasoningArtificial Analysis: K2 Horizon 375B A23B ↗
  76%vendorvendor-runHugging Face: IFM/K2-Horizon-375B-A23B model card ↗

  Leader: Kimi K3 at 88.7%

Other published results