Claude Haiku 5.5

Anthropic
Claude Haiku 5.5 launch post cover

Cost/1M tokens

input
$0.10
cached
$0.01
output
$0.50
cache write
$0.125
Context
1Mtokens
Released
1mo 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 #131

  1. 1452
    Gemma 4 31BSimilar price
  2. 1448
    MiMo-V2.6-FlashSimilar price
  3. 1441
    GPT-6 LunaSimilar price
  4. 1423
    Qwen3 MaxNearby rank
  5. 1423
    Mistral Large 4Nearby rank
  6. 1422
    Claude Haiku 5.5
  7. 1422
  8. 1421
    R1 0528Nearby rank
  9. 1414
    Claude Haiku 4.5Predecessor
  10. 1326
    Qwen3 30B A3BSimilar price

Level with Claude Haiku 4.5 (predecessor, overlapping 95% CIs) · Ahead of 1 of 4 similarly priced models

Arena WebDev

Best Arena rating per model · Higher is better

Arena #38

  1. 1638
    MiMo-V2.6-FlashSimilar price
  2. 1609
    Muse EmberSimilar price
  3. 1608
    GLM 5.2Nearby rank
  4. 1594
    Claude Haiku 5.5
  5. 1590
    Qwen3.8 27BNearby rank
  6. 1588
    Gemini 3.7 FlashNearby rank
  7. 1577
    GPT-6 LunaSimilar price
  8. 1370
    Gemma 4 31BSimilar price
  9. 1330
    Claude Haiku 4.5Predecessor

+264 vs Claude Haiku 4.5 (predecessor) · Ahead of 2 of 4 similarly priced models

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

Arena Document

Best Arena rating per model · Higher is better

Not ranked on Arena Document yet

Agent Arena

Best IPS score per model · Higher is better

Arena #29

  1. +0.020
  2. +0.017
    Muse EmberSimilar price
  3. +0.016
    GPT-6 LunaSimilar price
  4. +0.010
    GLM 5.3Nearby rank
  5. +0.006
    Kimi K3Nearby rank
  6. +0.005
    Claude Haiku 5.5
  7. +0.005
    Hy4 previewNearby rank
  8. +0.002
    GLM 5.2Nearby rank
  9. -0.000
    MiMo-V2.6-FlashSimilar price

Ahead of 0 of 4 similarly priced models

ARC-AGI-2

Best score per model · Higher is better

#33 of 85

  1. 78.1%
  2. 61.4%
  3. 61.4%
    Grok 4.7Nearby rank
  4. 61.3%
    Claude Haiku 5.5
  5. 61.3%
  6. 60.4%
  7. 59.3%
    GPT-6 LunaSimilar price
  8. 4.0%
    Claude Haiku 4.5Predecessor
  9. 1.3%
  10. 0.0%
    Llama 4 ScoutSimilar price

+57.2 pts vs Claude Haiku 4.5 (predecessor) · Ahead of 3 of 4 similarly priced models

FrontierMath-Tier-4-v2-Private

Best score per model · Higher is better

#23 of 72

  1. 56.1%
    GPT-6 LunaSimilar price
  2. 49.0%
    GPT-5.4Nearby rank
  3. 46.3%
    Qwen3.8 MaxNearby rank
  4. 46.3%
    Claude Haiku 5.5
  5. 46.3%
  6. 46.3%
    Muse Spark 1.3Nearby rank
  7. 24.4%
  8. 2.4%
    GPT-5 NanoSimilar price

Ahead of 2 of 4 similarly priced models

FrontierMath-Tiers-1-3-v2-Private

Best score per model · Higher is better

#22 of 87

  1. 78.9%
    GPT-6 LunaSimilar price
  2. 78.6%
    GPT-5.4Nearby rank
  3. 75.1%
    Claude Haiku 5.5
  4. 74.7%
    Qwen3.8 MaxNearby rank
  5. 74.4%
    Muse Spark 1.3Nearby rank
  6. 71.2%
  7. 20.4%
    Qwen3.6 35B A3BSimilar price
  8. 0.7%

Ahead of 3 of 4 similarly priced models

GPQA diamond

Best score per model · Higher is better

#47 of 161

  1. 93.2%
  2. 90.5%
    GPT-6 LunaSimilar price
  3. 89.9%
    GLM 5.1Nearby rank
  4. 89.8%
  5. 89.6%
    Claude Haiku 5.5
  6. 89.4%
  7. 89.3%
  8. 75.8%
    Gemma 4 31BSimilar price
  9. 71.2%
    Claude Haiku 4.5Predecessor
  10. 61.7%
    Qwen3 30B A3BSimilar price

+18.4 pts vs Claude Haiku 4.5 (predecessor) · Ahead of 2 of 4 similarly priced models

Humanity's Last Exam

Best score per model · Higher is better

#12 of 34

  1. 34.4%
    Claude Opus 4.6Nearby rank
  2. 31.6%
    GPT-5 ProNearby rank
  3. 30.1%
    Claude Haiku 5.5
  4. 27.8%
    GPT-5.2Nearby rank
  5. 25.3%
    GPT-5Nearby rank

OTIS Mock AIME 2024-2025

Best score per model · Higher is better

#19 of 158

  1. 99.4%
  2. 99.2%
    Muse Spark 1.3Nearby rank
  3. 99.2%
    Grok 4.6Nearby rank
  4. 98.9%
    Claude Haiku 5.5
  5. 98.9%
    Claude Opus 5Nearby rank
  6. 98.9%
    Gemini 3.8 FlashNearby rank
  7. 98.9%
    GPT-6 LunaSimilar price
  8. 73.3%
    Gemma 4 31BSimilar price
  9. 66.7%
    Claude Haiku 4.5Predecessor
  10. 62.8%
    Qwen3 30B A3BSimilar price

+32.2 pts vs Claude Haiku 4.5 (predecessor) · Ahead of 2 of 4 similarly priced models

SimpleQA Verified

Best score per model · Higher is better

#72 of 87

  1. 42.5%
  2. 41.4%
    GPT-6 LunaSimilar price
  3. 26.0%
  4. 25.4%
    Qwen3.5 PlusNearby rank
  5. 23.8%
    Claude Haiku 5.5
  6. 21.6%
    GPT-5 MiniNearby rank
  7. 20.3%
    Qwen3.5-FlashSimilar price
  8. 13.2%
    Claude Haiku 4.5Predecessor
  9. 10.4%
    Gemma 4 31BSimilar price

+10.6 pts vs Claude Haiku 4.5 (predecessor) · Ahead of 2 of 4 similarly priced models

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.

Reasoning effort

ARC-AGI-2

Score by reasoning effort · Higher is better

OTIS Mock AIME 2024-2025

Score by reasoning effort · Higher is better

All published scores

Benchmark compilation: Epoch AI, Capabilities & benchmarking (CC BY attribution). Scores are converted to percentages and model names matched to the Vertical Tabs catalog. Individual evaluations are credited to their original sources. External results may carry separate licences and evaluation configurations; do not interpret scores from different harnesses as directly comparable.

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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