Gemini 3.8 Flash vs Claude Opus 4.7

  • Gemini 3.8 Flash rates higher on LMArena’s text leaderboard: 1498 against 1490.
  • Gemini 3.8 Flash is cheaper: $0.82 / $4.13 per million input / output tokens, against $5 / $25 for Claude Opus 4.7.
  • On the 9 Vals AI benchmarks both have taken, Gemini 3.8 Flash wins 7 and Claude Opus 4.7 wins 2 (Gemini 3.8 Flash: Vibe Code Bench, LiveCodeBench, Tax Agent Bench).
LMArena text rating over time
14601470148014901500Apr 26Jun 26Jul 26Sep 26Oct 26
LatestClaude Opus 4.7 1490

Side by side

Models (2/6)
  • Gemini 3.8 Flash
  • Claude Opus 4.7
BenchmarkGemini 3.8 FlashClaude Opus 4.7
The model
LabGoogleAnthropic
Released2026-09-022026-04-16
WeightsProprietaryProprietary
Context window1M1M
Input, per 1M tokens$0.82$5
Output, per 1M tokens$4.13$25
LMArena, people’s votes
LMArena TextMillions of people compare two anonymous models side by side and vote for the better answer1498#8 of 3511490#13 of 351
LMArena WebDevPeople ask two anonymous models to build the same web app, try both and vote for the better one1585#36 of 1241558#41 of 124
LMArena VisionSide-by-side votes on prompts that include an image1315#7 of 1461317#5 of 146
LMArena CodingLMArena’s text votes on prompts that ask for code1508#17 of 3461518#9 of 346
LMArena MathLMArena’s text votes on math prompts1532#4 of 3391498#17 of 339
LMArena Creative writingLMArena’s text votes on stories, poems and other creative writing1489#8 of 3491486#11 of 349
LMArena Hard promptsLMArena’s text votes on the hardest prompts1509#9 of 3511506#11 of 351
LMArena Instruction followingLMArena’s text votes on prompts with specific instructions to follow1492#11 of 3511498#9 of 351
Vals AI, overall
Vals IndexVals AI’s headline score55.95%#15 of 27—
Vals AI, coding
Terminal-Bench 4.0Frontier-difficulty tasks an agent completes in a real terminal19.70%#31 of 55—
SWE-benchReal GitHub issues from open-source projects80.00%#23 of 8582.00%#21 of 85
Vibe Code BenchBuilding complete web apps from a plain-language brief, graded on whether the app works78.65%#29 of 11571.00%#41 of 115
Code MigrationRewriting working programs in a new language, graded on whether the new program still passes its tests38.65%#22 of 28—
LiveCodeBenchFresh competitive programming problems, collected after models’ training cut-offs to avoid contamination89.48%#3 of 14385.07%#36 of 143
Vals AI, finance
Finance AgentThe core tasks of a financial analyst, done as an agent with research tools65.76%#5 of 31—
Finance IndexVals AI’s composite of finance tasks60.46%#9 of 31—
Tax Agent BenchAgentic research into US corporate tax questions32.12%#21 of 7623.74%#43 of 76
Vals AI, law
Legal IndexVals AI’s composite of legal tasks69.78%#14 of 28—
Legal Research BenchAgentic US legal research38.94%#34 of 8538.46%#35 of 85
Vals AI, medicine
MedCodeAssigning the right medical billing codes from clinical notes48.13%#31 of 10754.86%#7 of 107
Vals AI, reasoning
GPQA DiamondGraduate-level questions in biology, physics and chemistry that experts answer well and search does not94.44%#4 of 13890.15%#26 of 138
MMLU-ProHarder, reasoning-focused multiple choice across 14 subjects, from law to engineering90.22%#5 of 13889.87%#8 of 138
AIMEProblems from the American Invitational Mathematics Examination, a qualifier for the US Math Olympiad—96.25%#7 of 96
MMMUCollege-level questions that need both an image and text89.08%#4 of 9385.55%#24 of 93
Terminal-Bench ScienceExpert-written scientific research workflows, run by an agent in a terminal8.57%#19 of 42—

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Questions

Which is better, Gemini 3.8 Flash or Claude Opus 4.7?

Gemini 3.8 Flash rates higher on LMArena’s text leaderboard: 1498 against 1490. Gemini 3.8 Flash is cheaper: $0.82 / $4.13 per million input / output tokens, against $5 / $25 for Claude Opus 4.7. On the 9 Vals AI benchmarks both have taken, Gemini 3.8 Flash wins 7 and Claude Opus 4.7 wins 2 (Gemini 3.8 Flash: Vibe Code Bench, LiveCodeBench, Tax Agent Bench).

Which is cheaper, Gemini 3.8 Flash or Claude Opus 4.7?

Gemini 3.8 Flash is cheaper: $0.82 / $4.13 per million input / output tokens, against $5 / $25 for Claude Opus 4.7.

Sources

Every number on this page comes from these sources; models without a published number show none. Download the data. Cite as “Nexus Explorer, nexus.inc/models”.