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Model Pareto

Claude Opus 5.5 vs Gemini 3.8 Flash

Claude Opus 5.5 scores higher than Gemini 3.8 Flash in all 5 shared categories. Claude Opus 5.5 costs 5.3× as much as Gemini 3.8 Flash ($8.00 vs $1.50 per million tokens, blended 3:1 input:output).
Claude Opus 5.5Gemini 3.8 Flash
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 Opus 5.5
    Quality
    96.9
    Rank
    #1/103
    Price
    $8.00/M tok
    Speed
    92tok/s
    In$4.00Out$20/M tok

    vs Gemini 3.8 Flash: +38.6 quality · 5.3× price

  • Gemini 3.8 Flash
    Quality
    58.3
    Rank
    #26/103
    Price
    $1.50/M tok
    Speed
    291tok/s
    In$0.75▾Out$3.75▾/M tok

    vs Claude Opus 5.5: −38.6 quality · 0.19× price

Overview

Metric
Claude Opus 5.5
Gemini 3.8 Flash
Lab
Anthropic
Google DeepMind
Released
Sep 22, 2026
Sep 2, 2026
Weights
Proprietary
Proprietary
Input price
$/M tok
$4.00
$0.75Best
Output price
$/M tok
$20
$3.75Best
Blended price
$/M tok · 3:1 in:out
$8.00
$1.50Best
Output speed
tok/s
92
291Best
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 Opus 5.5
Gemini 3.8 Flash
Coding
96.9±3.4Best
#1/103Mixedbest value
58.3±4.5
#26/103Verified
Writing & chat
93.0±4.3Best
#3/146Verifiedbest value
77.8±4.7
#15/146Verified
Vision
94.5±4.8Best
#2/82Verifiedbest value
82.6±4.2
#5/82Mixedbest value
Hard reasoning
99.9±2.6Best
#1/182Verifiedbest value
82.9±3.7
#11/182Verified
Agents
99.6±4.1Best
#1/173Verifiedbest value
76.1±5.8
#16/173Verified

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 Opus 5.5
Gemini 3.8 Flash
SWE-bench Verified
day 0
~#2/14~94.7%Estimated
  1. #1Claude Opus 596.0%
  2. ~#2Claude Opus 5.5Estimated94.7%
  3. #2Claude Sonnet 585.2%
estimated from related benchmarks
~#3/14~84.8%Estimated
  1. #1Claude Opus 596.0%
  2. #2Claude Sonnet 585.2%
  3. ~#3Gemini 3.8 FlashEstimated84.8%
  4. #3Gemini 3.1 Pro80.6%
estimated from related benchmarks
SWE-bench Pro (Public)
day 0
#1/1889.9%Lab-reported
  1. #1Claude Opus 5.589.9%
  2. #2Claude Sonnet 5.581.3%
www-cdn.anthropic.com · 2026-09-22
~#7/19~65.6%Estimated
  1. #1Claude Opus 5.589.9%
  2. #6Hy4 preview65.7%
  3. ~#7Gemini 3.8 FlashEstimated65.6%
  4. #7GPT-5.6 Terra63.4%
estimated from related benchmarks
DeepSWE v1.1
day 0
#8/3068.4%BestVerified
  1. #1DeepSeek V4.1 Flash74.2%
  2. #7GPT-6 Sol69.0%
  3. #8Claude Opus 5.568.4%
  4. #8Kimi K368.4%
artificialanalysis.ai · 2026-09-24
#14/3065.8%Verified
  1. #1DeepSeek V4.1 Flash74.2%
  2. #13GPT-5.567.0%
  3. #14Gemini 3.8 Flash65.8%
  4. #15Grok 4.664.9%
artificialanalysis.ai · 2026-09-24
Terminal-Bench 4.0
day 0
#2/8359.6%BestVerified
  1. #1Claude Sonnet 5.563.6%
  2. #2Claude Opus 5.559.6%
  3. #3GPT-6 Astra59.1%
artificialanalysis.ai · 2026-09-24
#18/8319.7%Verified
  1. #1Claude Sonnet 5.563.6%
  2. #17MiMo-V2.6-Flash22.7%
  3. #18Gemini 3.8 Flash19.7%
  4. #19Grok 4.617.2%
artificialanalysis.ai · 2026-09-24
LiveCodeBench
third-party
~#2/20~92.3%Estimated
  1. #1Qwen3.8-Omni-Flash92.6%
  2. ~#2Claude Opus 5.5Estimated92.3%
  3. #2Qwen3.8 Flash-Next91.9%
estimated from related benchmarks
~#3/20~91.7%Estimated
  1. #1Qwen3.8-Omni-Flash92.6%
  2. #2Qwen3.8 Flash-Next91.9%
  3. ~#3Gemini 3.8 FlashEstimated91.7%
  4. #3Qwen3.8 27B90.3%
estimated from related benchmarks
SciCode
third-party
#1/9566.9%BestVerified
  1. #1Claude Opus 5.566.9%
  2. #2Claude Fable 5.163.1%
artificialanalysis.ai · 2026-09-24
#12/9556.6%Verified
  1. #1Claude Opus 5.566.9%
  2. #11Grok 4.757.4%
  3. #12Gemini 3.8 Flash56.6%
  4. #13GPT-6 Astra56.5%
artificialanalysis.ai · 2026-09-24
AA Coding Agent Index
third-party
#1/1466.0BestVerified
  1. #1Claude Opus 5.566.0
  2. #2Claude Fable 5.162.2
artificialanalysis.ai · 2026-09-24
#13/1441.9Verified
  1. #1Claude Opus 5.566.0
  2. #12DeepSeek V4 Pro (0813)43.1
  3. #13Gemini 3.8 Flash41.9
  4. #14GPT-6 Luna41.1
artificialanalysis.ai · 2026-09-24
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 Opus 5.5
Gemini 3.8 Flash
IFBench
day 0
~#2/126~82.8%Estimated
  1. #1MiniMax-M382.9%
  2. ~#2Claude Opus 5.5Estimated82.8%
  3. #2Qwen3.8 2.4T A95B82.8%
estimated from related benchmarks
~#3/126~82.6%Estimated
  1. #1MiniMax-M382.9%
  2. #2Qwen3.8 2.4T A95B82.8%
  3. ~#3Gemini 3.8 FlashEstimated82.6%
  4. #3Qwen3.8-Omni-Flash81.5%
estimated from related benchmarks
MMMLU
day 0
~#2/5~92.3%Estimated
  1. #1Gemini 3.1 Pro92.6%
  2. ~#2Claude Opus 5.5Estimated92.3%
  3. #2Gemma 4 31B88.4%
estimated from related benchmarks
~#2/5~92.0%Estimated
  1. #1Gemini 3.1 Pro92.6%
  2. ~#2Gemini 3.8 FlashEstimated92.0%
  3. #2Gemma 4 31B88.4%
estimated from related benchmarks
LMArena Text, Non-English (Elo)
third-party
#1/531501BestVerified
  1. #1Claude Opus 5.51501
  2. #2Claude Fable 5.1Few votes1496
lmarena.ai · 2026-09-25
#4/531483VerifiedFew votes
  1. #1Claude Opus 5.51501
  2. #4Claude Opus 51483
  3. #4Gemini 3.8 FlashFew votes1483
  4. #6Gemini 3.1 Pro1480
lmarena.ai · 2026-09-25
LMArena Text (Elo)
third-party
#1/531509BestVerified
  1. #1Claude Opus 5.51509
  2. #2Claude Fable 5.11501
lmarena.ai · 2026-09-25
#3/531493Verified
  1. #1Claude Opus 5.51509
  2. #3Claude Opus 51493
  3. #3Gemini 3.8 Flash1493
  4. #3Muse Spark 1.31493
lmarena.ai · 2026-09-24
EQ-Bench Creative Writing v3 (Elo)
third-party
#7/252050BestVerified
  1. #1GPT-6 Astra2173
  2. #6GLM-5.32075
  3. #7Claude Opus 5.52050
  4. #8Grok 4.72007
eqbench.com · 2026-09-24
#15/251748Verified
  1. #1GPT-6 Astra2173
  2. #14Claude Sonnet 51794
  3. #15Gemini 3.8 Flash1748
  4. #16Nemotron 3 Ultra1692
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 Opus 5.5
Gemini 3.8 Flash
MMMU
day 0
~#2/3~71.3%Estimated
  1. #1Claude Haiku 4.573.2%
  2. ~#2Claude Opus 5.5Estimated71.3%
  3. #2Llama 4 Maverick69.4%
estimated from related benchmarks
~#2/3~71.3%Estimated
  1. #1Claude Haiku 4.573.2%
  2. ~#2Gemini 3.8 FlashEstimated71.3%
  3. #2Llama 4 Maverick69.4%
estimated from related benchmarks
MMMU-Pro
day 0
#1/7687.7%BestVerified
  1. #1Claude Opus 5.587.7%
  2. #2GPT-6 Astra86.9%
artificialanalysis.ai · 2026-09-24
#3/7685.6%Verified
  1. #1Claude Opus 5.587.7%
  2. #2GPT-6 Astra86.9%
  3. #3Gemini 3.8 Flash85.6%
  4. #4Claude Opus 584.7%
artificialanalysis.ai · 2026-09-24
CharXiv Reasoning
day 0
~#2/9~86.1%Estimated
  1. #1Gemini 3.8 Flash86.2%
  2. ~#2Claude Opus 5.5Estimated86.1%
  3. #2Kimi K384.8%
estimated from related benchmarks
#1/886.2%Lab-reported
  1. #1Gemini 3.8 Flash86.2%
  2. #2Kimi K384.8%
deepmind.google · 2026-09-02
OmniDocBench v1.5
third-party
~#2/8~91.4%Estimated
  1. #1MiniMax-M391.6%
  2. ~#2Claude Opus 5.5Estimated91.4%
  3. #2Kimi K391.1%
estimated from related benchmarks
~#4/8~89.9%Estimated
  1. #1MiniMax-M391.6%
  2. #2Qwen3.8 27B91.1%
  3. ~#4Gemini 3.8 FlashEstimated89.9%
  4. #4Gemini 3.1 Pro85.3%
estimated from related benchmarks
GDP.pdf (AA)
third-party
#3/4226.2%BestVerified
  1. #1GPT-6 Astra31.0%
  2. #3Claude Fable 5.126.2%
  3. #3Claude Opus 5.526.2%
  4. #5GPT-6 Sol24.8%
artificialanalysis.ai · 2026-09-24
#11/4221.0%Verified
  1. #1GPT-6 Astra31.0%
  2. #10GPT-5.521.2%
  3. #11Gemini 3.8 Flash21.0%
  4. #12GPT-6 Luna20.4%
artificialanalysis.ai · 2026-09-24
Chartography
third-party
#2/2266.3%BestVerified
  1. #1GPT-6 Astra71.0%
  2. #2Claude Opus 5.566.3%
  3. #3GPT-6 Sol53.6%
surgehq.ai · 2026-09-24
#5/2240.9%Verified
  1. #1GPT-6 Astra71.0%
  2. #4Claude Fable 5.146.2%
  3. #5Gemini 3.8 Flash40.9%
  4. #6GPT-5.6 Terra34.0%
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 Opus 5.5
Gemini 3.8 Flash
GPQA Diamond
day 0
~#2/173~96.1%Estimated
  1. #1GPT-6 Astra96.1%
  2. ~#2Claude Opus 5.5Estimated96.1%
  3. #2Gemini 3.8 Flash95.3%
estimated from related benchmarks
#2/17295.3%Verified
  1. #1GPT-6 Astra96.1%
  2. #2Gemini 3.8 Flash95.3%
  3. #3Gemini 3.1 Pro94.1%
artificialanalysis.ai · 2026-09-24
Humanity's Last Exam
day 0
#1/17861.4%BestVerified
  1. #1Claude Opus 5.561.4%
  2. #2Claude Fable 5.159.1%
artificialanalysis.ai · 2026-09-24
#9/17847.8%Verified
  1. #1Claude Opus 5.561.4%
  2. #8GPT-6 Sol47.9%
  3. #9Gemini 3.8 Flash47.8%
  4. #10Gemini 3.1 Pro47.0%
artificialanalysis.ai · 2026-09-24
AIME (latest)
day 0
~#2/25~96.7%Estimated
  1. #1Inkling97.1%
  2. ~#2Claude Opus 5.5Estimated96.7%
  3. #2Muse Glimmer94.7%
estimated from related benchmarks
~#2/25~96.8%Estimated
  1. #1Inkling97.1%
  2. ~#2Gemini 3.8 FlashEstimated96.8%
  3. #2Muse Glimmer94.7%
estimated from related benchmarks
AA Intelligence Index
third-party
#1/7457.6BestVerified
  1. #1Claude Opus 5.557.6
  2. #2Claude Sonnet 5.556.0
artificialanalysis.ai · 2026-09-24
#17/7440.9Verified
  1. #1Claude Opus 5.557.6
  2. #16GLM-5.3 Flash41.8
  3. #17Gemini 3.8 Flash40.9
  4. #18Qwen3.8 2.4T A95B39.9
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 Opus 5.5
Gemini 3.8 Flash
τ²-bench (Telecom)
day 0
~#2/116~98.3%Estimated
  1. #1Step 3.7 Flash98.5%
  2. ~#2Claude Opus 5.5Estimated98.3%
  3. #2Gemini 3.1 Pro95.6%
estimated from related benchmarks
~#2/116~98.3%Estimated
  1. #1Step 3.7 Flash98.5%
  2. ~#2Gemini 3.8 FlashEstimated98.3%
  3. #2Gemini 3.1 Pro95.6%
estimated from related benchmarks
OSWorld-Verified
day 0
~#2/12~84.6%Estimated
  1. #1Kimi K384.8%
  2. ~#2Claude Opus 5.5Estimated84.6%
  3. #2Qwen3.8 27B84.3%
estimated from related benchmarks
~#4/12~82.0%Estimated
  1. #1Kimi K384.8%
  2. #3Nex-N2.5-Pro82.2%
  3. ~#4Gemini 3.8 FlashEstimated82.0%
  4. #4MiMo-V2.6-Pro82.0%
estimated from related benchmarks
OSWorld 2.0
day 0
~#2/5~58.7%Estimated
  1. #1GLM-5.3 Flash59.1%
  2. ~#2Claude Opus 5.5Estimated58.7%
  3. #2Kimi K358.3%
estimated from related benchmarks
~#3/5~54.1%Estimated
  1. #1GLM-5.3 Flash59.1%
  2. #2Kimi K358.3%
  3. ~#3Gemini 3.8 FlashEstimated54.1%
  4. #3GPT-5.6 Terra50.2%
estimated from related benchmarks
BrowseComp
day 0
~#2/18~92.3%Estimated
  1. #1Atria Dawn Preview92.5%
  2. ~#2Claude Opus 5.5Estimated92.3%
  3. #2GPT-6 Astra91.5%
estimated from related benchmarks
~#7/18~88.0%Estimated
  1. #1Atria Dawn Preview92.5%
  2. #6Step 5 Preview88.7%
  3. ~#7Gemini 3.8 FlashEstimated88.0%
  4. #7GPT-5.6 Terra87.5%
estimated from related benchmarks
GDPval-AA (Elo)
third-party
#1/861846BestVerified
  1. #1Claude Opus 5.51846
  2. #2Claude Fable 5.11735
artificialanalysis.ai · 2026-09-24
#21/861412Verified
  1. #1Claude Opus 5.51846
  2. #20GPT-5.6 Terra1432
  3. #21Gemini 3.8 Flash1412
  4. #22Qwen3.8 27B1409
artificialanalysis.ai · 2026-09-24
AutomationBench-AA
third-party
#1/7969.5%BestVerified
  1. #1Claude Opus 5.569.5%
  2. #2DeepSeek V4.1 Flash68.9%
artificialanalysis.ai · 2026-09-24
#9/7959.9%Verified
  1. #1Claude Opus 5.569.5%
  2. #8GLM-5.3 Flash60.4%
  3. #9Gemini 3.8 Flash59.9%
  4. #10GPT-5.6 Terra59.6%
artificialanalysis.ai · 2026-09-24
τ-Bench Banking (AA)
third-party
~#3/89~50.0%Estimated
  1. #1Muse Spark 1.350.5%
  2. #2GLM-5.350.3%
  3. ~#3Claude Opus 5.5Estimated50.0%
  4. #3Qwen3.8 2.4T A95B49.1%
estimated from related benchmarks
#10/8844.9%Verified
  1. #1Muse Spark 1.350.5%
  2. #9Qwen3.8 Flash-Next45.4%
  3. #10Gemini 3.8 Flash44.9%
  4. #11Grok 4.643.3%
artificialanalysis.ai · 2026-09-24
Not comparable across labs (1)
OSWorld 2.0 (Sept 2026 release)
day 0
#1/381.8%Lab-reported
  1. #1Claude Opus 5.581.8%
  2. #2Claude Fable 5.180.7%
anthropic.com · 2026-09-22
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