X-Ai/Grok-4-Fast-Reasoning

xAI
X-Ai/Grok-4-Fast-Reasoning cover image
Context
2Mtokens
Released
10mo ago

Benchmarks

DeepSWE is the primary coding benchmark where an exact model evaluation exists. Arena leaderboards and other sourced evaluations appear below; missing scores are not zero.

How it ranks

Against its predecessor, similarly priced models and the models ranked around it.

DeepSWE 1.1

Best pass@1 per model · Higher is better

Not evaluated in DeepSWE 1.1

Arena Text

Best Arena rating per model · Higher is better

Arena #161

  1. 1441
    GLM 4.7Similar release date
  2. 1408
  3. 1405
    Inkling SmallNearby rank
  4. 1405
    X-Ai/Grok-4-Fast-Reasoning
  5. 1402
    Qwen3 235B-A22BNearby rank
  6. 1402
    Claude Sonnet 4Nearby rank
  7. 1392
    MiMo-V2-FlashSimilar release date
  8. 1329
    Olmo 3.1 32B InstructSimilar release date
  9. 1314
    Nemotron 3 Nano 30B A3BSimilar release date

Ahead of 3 of 4 models released around the same time

Arena WebDev

Best Arena rating per model · Higher is better

Arena #155

  1. 1435
    GLM 4.7Similar release date
  2. 1420
    GPT-5.2Similar release date
  3. 1331
    MiMo-V2-FlashSimilar release date
  4. 1196
    Devstral 2 2512Similar release date
  5. 1164
  6. 1162
    X-Ai/Grok-4-Fast-Reasoning
  7. 1072
    Devstral MediumNearby rank

Ahead of 0 of 4 models released around the same time

Arena Vision

Best Arena rating per model · Higher is better

Not ranked on Arena Vision yet

Arena Search

Best Arena rating per model · Higher is better

Not ranked on Arena Search yet

Agent Arena

Best IPS score per model · Higher is better

Not ranked on Agent Arena yet

Not evaluated in DeepSWE 1.1 as of 2026-09-22. Results are only shown for exact model versions in the official dataset. Official leaderboard.

All published scores

Arena ratings: Arena (lmarena-ai/leaderboard-dataset), licensed CC BY 4.0. Ratings come from pairwise human votes and are only comparable within one leaderboard; the interval is Arena's 95% confidence interval. Model names are matched to the Vertical Tabs catalog.

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