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LongCat

LongCat 2.0

  • Released
  • Open weights
  • MIT
Intelligence Index

Reasoning setting

19.1#53 of 83measured models
Measured · Artificial Analysis v4.3.2
API price from
$0.12 in / $0.48 out / 1M tokOpenRouter · AtlasCloud · FP8 · promotional
Context window
1M tok

Performance profile

ReasoningRank #57 of 107
78.0%
GPQA Diamond
CodingRank #75 of 94
36.3%
SciCode
Cost efficiencyRank #12 of 67
324.0pts / $
Intelligence ÷ eval cost

Capabilities

Context window

Modalities

Measured setting

Integration

Reasoning trade-offs

Source (opens in a new tab)
Intelligence Index v4.3.2
LongCat 2.0
Cost per task (USD) · log scale
LongCat 2.0Reasoning
Intelligence Index
19.1
Cost / task
$0.059

Pricing & access

API route
OpenRouter · AtlasCloud · FP8API
Tier & contextStandard · Promotional

USD per 1M tokens

Input
$0.12
Output
$0.48
Cached input
$0.0024

Run locally

Benchmarks

Full leaderboardSource (opens in a new tab)

Humanity’s Last Exam

Frontier reasoning

LongCat 2.0 · Reasoning#43 of 126

  1. 1Claude Opus 5.5Max61.4%
  2. 2Claude Fable 5.1Max59.1%
  3. 3Gemini 4 ArgonHigh57.1%
  4. 40Apodex 1.1Reasoning34.1%
  5. 41Qwen3.8-27BExtra high33.9%
  6. 42Nex-N2-ProReasoning33.7%
  7. 43LongCat 2.0Reasoning33.7%
  8. 44Agnes 2.5 Pro AlphaReasoning33.6%
  9. 45Hy3Reasoning33.5%
  10. 46Inkling SmallReasoning33.3%

Peers use their best measured result on this benchmark.

Alternatives

Each model at its highest-scoring measured setting · Intelligence Index v4.3.2 and its evaluation cost per task.