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Model Pareto

Claude Sonnet 5.5 vs Claude Sonnet 5

Claude Sonnet 5.5 scores higher than Claude Sonnet 5 in both shared categories. Both cost about $4.00 per million tokens, blended 3:1 input:output.
Claude Sonnet 5.5Claude Sonnet 5
Focus

Coding: quality vs price

Compared models are ringed; the other 101 ranked here are greyed.

Lower price is better. Pareto frontier: Granite 4.2 3B, NVIDIA Nemotron 3 Nano 30B A3B, gpt-oss-20b, Ling-3.0-flash-VL, MiMo-V2.6-Flash, GLM-5.3 Flash, DeepSeek V4.1 Flash, MiMo-V2.6-Pro, Claude Sonnet 5.5, Claude Opus 5.5. 26 models are not plotted: Xing4.0-29B-A4B, Nex-N2.5-Pro, Atria Dawn Preview, Intern-S2-397B, Solar Open2 250B, Phi-4-reasoning-plus, Motif 3, Nex-N2-Pro, Nex-N2.5-Mini, A.X-K2, K2 Horizon 375B A23B, K-EXAONE 2.0 0803, K2 Horizon MoVA 36B A4B, Intern-S2-Preview (35B-A3B), Command A+, North Mini Code, G9v3-39A5B, Falcon-H1-34B-Instruct, Devstral 2, K2 Horizon 7B, Devstral Small 2, MiniCPM5-2B, Ling 3.0 Tiny, K2 Horizon 3.7B, K2 Horizon 0.9B, LFM2.5-2.6B.

26 models with no price data — shown in the strip at the left edge

Xing4.0-29B-A4B, Nex-N2.5-Pro, Atria Dawn Preview, Intern-S2-397B, Solar Open2 250B, Phi-4-reasoning-plus, Motif 3, Nex-N2-Pro, Nex-N2.5-Mini, A.X-K2, K2 Horizon 375B A23B, K-EXAONE 2.0 0803, K2 Horizon MoVA 36B A4B, Intern-S2-Preview (35B-A3B), Command A+, North Mini Code, G9v3-39A5B, Falcon-H1-34B-Instruct, Devstral 2, K2 Horizon 7B, Devstral Small 2, MiniCPM5-2B, Ling 3.0 Tiny, K2 Horizon 3.7B, K2 Horizon 0.9B, LFM2.5-2.6B

  • Best-value frontier (nothing is both cheaper and better)
  • Evidencestrong → weak
  • Estimated from other categories
  • Claude Sonnet 5.5
    Quality
    91.7
    Rank
    #2/103
    Price
    $4.00/M tok
    Speed
    —
    In$2.00▾Out$10▾/M tok

    vs Claude Sonnet 5: +35.0 quality · 1× price

  • Claude Sonnet 5
    Quality
    56.6
    Rank
    #27/103
    Price
    $4.00/M tok
    Speed
    79tok/s
    In$2.00▾Out$10▾/M tok

    vs Claude Sonnet 5.5: −35.0 quality · 1× price

Overview

Metric
Claude Sonnet 5.5
Claude Sonnet 5
Lab
Anthropic
Anthropic
Released
Sep 28, 2026
Jun 30, 2026
Weights
Proprietary
Proprietary
Input price
$/M tok
$2.00Best
$2.00Best
Output price
$/M tok
$10Best
$10Best
Blended price
$/M tok · 3:1 in:out
$4.00Best
$4.00Best
Output speed
tok/s
—
79
Context
tokens
1MBest
1MBest

Quality by category

0–100 within each category (100 = best tracked model). Rank is among all models ranked there. Click a row to focus it.

Metric
Claude Sonnet 5.5
Claude Sonnet 5
Coding
91.7±5.2Best
#2/103Mixedbest value
56.6±5.4
#27/103Mixed
Writing & chat
Not ranked
68.3±4.3
#29/146Verified
Vision
Not ranked
56.2±4.2
#36/82Mixed
Hard reasoning
95.2±4.9Best
#3/182Verifiedbest value
76.5±3.7
#22/182Verified
Agents
Not ranked
65.3±3.8
#27/173Mixed

Coding benchmarks

Rank among models with a published score, and the leaderboard around each model. ~ italic = no published score, estimated from related benchmarks.

Metric
Claude Sonnet 5.5
Claude Sonnet 5
SWE-bench Verified
day 0
~#2/14~93.8%Estimated
  1. #1Claude Opus 596.0%
  2. ~#2Claude Sonnet 5.5Estimated93.8%
  3. #2Claude Sonnet 585.2%
estimated from related benchmarks
#2/1385.2%Lab-reported
  1. #1Claude Opus 596.0%
  2. #2Claude Sonnet 585.2%
  3. #3Gemini 3.1 Pro80.6%
www-cdn.anthropic.com · 2026-06-30
SWE-bench Pro (Public)
day 0
#2/1881.3%BestLab-reported
  1. #1Claude Opus 5.589.9%
  2. #2Claude Sonnet 5.581.3%
  3. #3Claude Fable 5.181.2%
anthropic.com · 2026-09-28
#8/1863.2%Lab-reported
  1. #1Claude Opus 5.589.9%
  2. #7GPT-5.6 Terra63.4%
  3. #8Claude Sonnet 563.2%
  4. #9Nex-N2.5-Pro61.2%
anthropic.com · 2026-06-30
DeepSWE v1.1
day 0
#5/3071.0%Lab-reported
  1. #1DeepSeek V4.1 Flash74.2%
  2. #4Muse Spark 1.371.7%
  3. #5Claude Sonnet 5.571.0%
  4. #6GPT-5.6 Terra69.6%
anthropic.com · 2026-09-28
~#22/31~59.1%Estimated
  1. #1DeepSeek V4.1 Flash74.2%
  2. #21GLM-5.361.4%
  3. ~#22Claude Sonnet 5Estimated59.1%
  4. #22Qwen3.8 Flash-Next58.7%
estimated from related benchmarks
Terminal-Bench 4.0
day 0
#1/8363.6%BestVerified
  1. #1Claude Sonnet 5.563.6%
  2. #2Claude Opus 5.559.6%
artificialanalysis.ai · 2026-09-28
#21/8314.1%Verified
  1. #1Claude Sonnet 5.563.6%
  2. #20GPT-5.514.6%
  3. #21Claude Sonnet 514.1%
  4. #21DeepSeek V4 Pro (0813)14.1%
artificialanalysis.ai · 2026-09-24
LiveCodeBench
third-party
~#2/20~92.2%Estimated
  1. #1Qwen3.8-Omni-Flash92.6%
  2. ~#2Claude Sonnet 5.5Estimated92.2%
  3. #2Qwen3.8 Flash-Next91.9%
estimated from related benchmarks
~#6/20~85.9%Estimated
  1. #1Qwen3.8-Omni-Flash92.6%
  2. #5gpt-oss-120b87.8%
  3. ~#6Claude Sonnet 5Estimated85.9%
  4. #6Gemma 4 31B80.0%
estimated from related benchmarks
SciCode
third-party
#3/9561.0%BestVerified
  1. #1Claude Opus 5.566.9%
  2. #2Claude Fable 5.163.1%
  3. #3Claude Sonnet 5.561.0%
  4. #4MiMo-V2.6-Pro60.9%
artificialanalysis.ai · 2026-09-28
#18/9554.3%Verified
  1. #1Claude Opus 5.566.9%
  2. #17GPT-6 Luna54.6%
  3. #18Claude Sonnet 554.3%
  4. #19Qwen3.8 2.4T A95B54.1%
artificialanalysis.ai · 2026-09-24
AA Coding Agent Index
third-party
~#4/15~61.0Estimated
  1. #1Claude Opus 5.566.0
  2. #3GPT-6 Astra61.6
  3. ~#4Claude Sonnet 5.5Estimated61.0
  4. #4Claude Opus 559.7
estimated from related benchmarks
~#11/15~45.7Estimated
  1. #1Claude Opus 5.566.0
  2. #10Grok 4.647.0
  3. ~#11Claude Sonnet 5Estimated45.7
  4. #11Qwen3.8 Max (0902)43.3
estimated from related benchmarks
Benchmarks in other categories (4)

Writing & chat benchmarks

Rank among models with a published score, and the leaderboard around each model. ~ italic = no published score, estimated from related benchmarks.

Metric
Claude Sonnet 5.5
Claude Sonnet 5
IFBench
day 0
—
~#21/126~73.5%Estimated
  1. #1MiniMax-M382.9%
  2. #20Command A+73.9%
  3. ~#21Claude Sonnet 5Estimated73.5%
  4. #21GPT-5.4 mini73.3%
estimated from related benchmarks
MMMLU
day 0
—
~#2/5~89.9%Estimated
  1. #1Gemini 3.1 Pro92.6%
  2. ~#2Claude Sonnet 5Estimated89.9%
  3. #2Gemma 4 31B88.4%
estimated from related benchmarks
LMArena Text, Non-English (Elo)
third-party
—
#18/531447Verified
  1. #1Claude Opus 5.51501
  2. #16GPT-6 Sol1448
  3. #18Claude Sonnet 51447
  4. #18Grok 4.61447
lmarena.ai · 2026-09-24
LMArena Text (Elo)
third-party
—
#17/531461Verified
  1. #1Claude Opus 5.51509
  2. #16DeepSeek V4 Pro (0813)1463
  3. #17Claude Sonnet 51461
  4. #18GPT-6 Sol1457
lmarena.ai · 2026-09-24
EQ-Bench Creative Writing v3 (Elo)
third-party
—
#14/251794Verified
  1. #1GPT-6 Astra2173
  2. #13Muse Glimmer1798
  3. #14Claude Sonnet 51794
  4. #15Gemini 3.8 Flash1748
eqbench.com · 2026-09-24

Vision benchmarks

Rank among models with a published score, and the leaderboard around each model. ~ italic = no published score, estimated from related benchmarks.

Metric
Claude Sonnet 5.5
Claude Sonnet 5
MMMU
day 0
—
~#2/3~71.3%Estimated
  1. #1Claude Haiku 4.573.2%
  2. ~#2Claude Sonnet 5Estimated71.3%
  3. #2Llama 4 Maverick69.4%
estimated from related benchmarks
MMMU-Pro
day 0
—
#20/7677.3%Verified
  1. #1Claude Opus 5.587.7%
  2. #19GPT-5.3 Codex78.5%
  3. #20Claude Sonnet 577.3%
  4. #20Qwen3.5 397B A17B77.3%
artificialanalysis.ai · 2026-09-24
CharXiv Reasoning
day 0
—
#7/877.0%Lab-reported
  1. #1Gemini 3.8 Flash86.2%
  2. #6Inkling78.1%
  3. #7Claude Sonnet 577.0%
  4. #8Gemini 3.5 Flash-Lite74.5%
www-cdn.anthropic.com · 2026-06-30
OmniDocBench v1.5
third-party
—
~#4/8~85.7%Estimated
  1. #1MiniMax-M391.6%
  2. #2Qwen3.8 27B91.1%
  3. ~#4Claude Sonnet 5Estimated85.7%
  4. #4Gemini 3.1 Pro85.3%
estimated from related benchmarks
GDP.pdf (AA)
third-party
—
#23/4213.2%Verified
  1. #1GPT-6 Astra31.0%
  2. #22GPT-5.4 mini13.4%
  3. #23Claude Sonnet 513.2%
  4. #24DeepSeek V4.1 Flash12.8%
artificialanalysis.ai · 2026-09-24
Chartography
third-party
—
#16/2216.6%Verified
  1. #1GPT-6 Astra71.0%
  2. #15Muse Glimmer17.2%
  3. #16Claude Sonnet 516.6%
  4. #17GLM-5.3 Flash16.3%
surgehq.ai · 2026-09-24

Hard reasoning benchmarks

Rank among models with a published score, and the leaderboard around each model. ~ italic = no published score, estimated from related benchmarks.

Metric
Claude Sonnet 5.5
Claude Sonnet 5
GPQA Diamond
day 0
~#2/173~96.0%Estimated
  1. #1GPT-6 Astra96.1%
  2. ~#2Claude Sonnet 5.5Estimated96.0%
  3. #2Gemini 3.8 Flash95.3%
estimated from related benchmarks
#21/17291.1%Verified
  1. #1GPT-6 Astra96.1%
  2. #20GLM-5.3 Flash91.2%
  3. #21Claude Sonnet 591.1%
  4. #22Qwen3.8-Omni-Flash91.0%
artificialanalysis.ai · 2026-09-24
Humanity's Last Exam
day 0
#3/17855.0%BestVerified
  1. #1Claude Opus 5.561.4%
  2. #2Claude Fable 5.159.1%
  3. #3Claude Sonnet 5.555.0%
  4. #4Claude Opus 554.9%
artificialanalysis.ai · 2026-09-28
#22/17841.3%Verified
  1. #1Claude Opus 5.561.4%
  2. #21GLM-5.342.3%
  3. #22Claude Sonnet 541.3%
  4. #23DeepSeek V4 Pro (0813)41.0%
artificialanalysis.ai · 2026-09-24
AIME (latest)
day 0
~#2/25~96.5%Estimated
  1. #1Inkling97.1%
  2. ~#2Claude Sonnet 5.5Estimated96.5%
  3. #2Muse Glimmer94.7%
estimated from related benchmarks
~#2/25~95.9%Estimated
  1. #1Inkling97.1%
  2. ~#2Claude Sonnet 5Estimated95.9%
  3. #2Muse Glimmer94.7%
estimated from related benchmarks
AA Intelligence Index
third-party
#2/7456.0BestVerified
  1. #1Claude Opus 5.557.6
  2. #2Claude Sonnet 5.556.0
  3. #3Claude Fable 5.153.4
artificialanalysis.ai · 2026-09-28
#22/7438.2Verified
  1. #1Claude Opus 5.557.6
  2. #21GPT-5.538.4
  3. #22Claude Sonnet 538.2
  4. #23GPT-6 Luna37.3
artificialanalysis.ai · 2026-09-24

Agents benchmarks

Rank among models with a published score, and the leaderboard around each model. ~ italic = no published score, estimated from related benchmarks.

Metric
Claude Sonnet 5.5
Claude Sonnet 5
τ²-bench (Telecom)
day 0
—
~#11/116~91.6%Estimated
  1. #1Step 3.7 Flash98.5%
  2. #10Ring-2.6-1T92.4%
  3. ~#11Claude Sonnet 5Estimated91.6%
  4. #11MiMo-V2.590.6%
estimated from related benchmarks
OSWorld-Verified
day 0
—
#5/1181.2%Lab-reported
  1. #1Kimi K384.8%
  2. #4MiMo-V2.6-Pro82.0%
  3. #5Claude Sonnet 581.2%
  4. #6MiMo-V2.6-Flash80.8%
anthropic.com · 2026-06-30
OSWorld 2.0
day 0
—
~last/5below measured range (<47.5%)Estimated
  1. #1GLM-5.3 Flash59.1%
  2. #4GPT-5.547.5%
  3. ~#5Claude Sonnet 5Estimated<47.5%
estimated from related benchmarks
BrowseComp
day 0
—
#9/1784.7%Lab-reported
  1. #1Atria Dawn Preview92.5%
  2. #8Gemini 3.1 Pro85.9%
  3. #9Claude Sonnet 584.7%
  4. #10GPT-5.584.4%
www-cdn.anthropic.com · 2026-06-30
GDPval-AA (Elo)
third-party
—
#18/861449Verified
  1. #1Claude Opus 5.51846
  2. #17GPT-6 Sol1487
  3. #18Claude Sonnet 51449
  4. #19DeepSeek V4 Pro (0813)1441
artificialanalysis.ai · 2026-09-24
AutomationBench-AA
third-party
—
#25/7936.5%Verified
  1. #1Claude Opus 5.569.5%
  2. #24K2 Horizon 375B A23B37.2%
  3. #25Claude Sonnet 536.5%
  4. #26GPT-5.5 Instant (June 2026)36.4%
artificialanalysis.ai · 2026-09-24
τ-Bench Banking (AA)
third-party
—
#17/8837.3%Verified
  1. #1Muse Spark 1.350.5%
  2. #16GPT-5.539.0%
  3. #17Claude Sonnet 537.3%
  4. #18Motif 335.3%
artificialanalysis.ai · 2026-09-24