Noometry

Model comparison

Claude Opus 4.8 vs Gemini 3.1 Flash Lite

Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 40.8 on the Noometry Index. Gemini 3.1 Flash Lite costs 18× less per token, which makes it the better buy when Claude Opus 4.8's lead doesn't matter for your workload.

Last verified . 35 shared benchmarks.

Claude Opus 4.8 Anthropic

60.7

Rank #13 Confirmed

Gemini 3.1 Flash Lite Google

40.8

Rank #144 Confirmed

Summary

  • They share 35 benchmarks with published results for both. Claude Opus 4.8 scores higher in 10 categories and Gemini 3.1 Flash Lite in 0 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 4.8 leads 64.7 to 22.9.
  • The biggest single-benchmark swing is NYT Connections (extended): 91.1% for Claude Opus 4.8 and 8.2% for Gemini 3.1 Flash Lite.
  • Gemini 3.1 Flash Lite is cheaper at $0.25 / $1.50 per million input/output tokens, against $5 / $25 for Claude Opus 4.8.
  • Gemini 3.1 Flash Lite accepts more context: 1.05M tokens versus 1M.

Side by side

Claude Opus 4.8Gemini 3.1 Flash Lite
ProviderAnthropicGoogle
Noometry Index60.740.8
Released2026-05-282026-03-03
WeightsProprietaryProprietary
Context window1M1.05M
Max output128K66K
Input $ / M tokens$5$0.25
Output $ / M tokens$25$1.50
Results tracked6538

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Category by category

Coding Claude Opus 4.8 leads

Claude Opus 4.8: 59.9 (#12), Gemini 3.1 Flash Lite: 37.8 (#188)

BenchmarkClaude Opus 4.8Gemini 3.1 Flash Lite
LMArena WebDev15561256
SciCode53.5%41.9%
WeirdML82.9%52.2%
LMArena Coding14901400
ALE-Bench1,564797.73
DeepSWE59%—
FrontierCode46.5%—
GSO47.1%—

Agentic & Tool Use Claude Opus 4.8 leads

Claude Opus 4.8: 47.6 (#11), Gemini 3.1 Flash Lite: 30.2 (#79)

BenchmarkClaude Opus 4.8Gemini 3.1 Flash Lite
DeepResearch Bench50.2%37.3%
APEX-Agents48.9%—
OSWorld 2.020.6%—
Remote Labor Index8.3%—
τ²-bench Banking39.7%—
PostTrainBench33.8%—
GBAEval70.9%—
GDP.pdf24%—
LMArena Search1204—
Vending-Bench 25,787—

Reasoning Claude Opus 4.8 leads

Claude Opus 4.8: 64.7 (#16), Gemini 3.1 Flash Lite: 22.9 (#186)

BenchmarkClaude Opus 4.8Gemini 3.1 Flash Lite
Kagi LLM Benchmark88.8%67.2%
NYT Connections (extended)91.1%8.2%
CritPt20.9%1.1%
Chess Puzzles34%25%
EnigmaEval23.5%3%
LMArena Hard Prompts14821407
DTBench94.9%76.8%
LMCA57.5%35%
Epoch Capabilities Index158.21144.47
ForecastBench59.954.4
ARC-AGI-272.1%—
SimpleBench64.8%—
ARC-AGI-192.5%—
Thematic Generalization—63.3%
EBR-Bench28.6%—
Mystery Game Puzzles36%—
Surface Evolver Bench87.5%—
Bench to the Future 30.14—

Math Claude Opus 4.8 leads

Claude Opus 4.8: 78.4 (#13), Gemini 3.1 Flash Lite: 40.7 (#90)

BenchmarkClaude Opus 4.8Gemini 3.1 Flash Lite
FrontierMath (Tiers 1-3)80%27.7%
OTIS Mock AIME 2024-202598.3%80%
LMArena Math14871428
FrontierMath Tier 456.1%—
MathArena Final-Answer Competitions91.8%—
ProofBench69%—
FrontierMath (Feb 2025 set)47.2%—
FrontierMath Tier 4 (v1)31.3%—

Knowledge Claude Opus 4.8 leads

Claude Opus 4.8: 61.3 (#29), Gemini 3.1 Flash Lite: 41.9 (#104)

BenchmarkClaude Opus 4.8Gemini 3.1 Flash Lite
GPQA Diamond91%81.8%
LMArena Expert15021398
Humanity's Last Exam—8.6%
SimpleQA Verified53%—
Vectara Hallucination Rate—8.2%

Multimodal Claude Opus 4.8 leads

Claude Opus 4.8: 42.9 (#26), Gemini 3.1 Flash Lite: 39.4 (#60)

BenchmarkClaude Opus 4.8Gemini 3.1 Flash Lite
LMArena Vision12941240
Blueprint-Bench 214.5%—
Furniture Assembly42.5%—
LMArena Document1475—

Multilingual Claude Opus 4.8 leads

Claude Opus 4.8: 55.2 (#33), Gemini 3.1 Flash Lite: 52.3 (#86)

BenchmarkClaude Opus 4.8Gemini 3.1 Flash Lite
LMArena Non-English14501411
LMArena Chinese15071461
LMArena French14811424
LMArena German14721429
LMArena Japanese14401413
LMArena Korean14321392
LMArena Russian14741420
LMArena Spanish14661421

Instruction Following Claude Opus 4.8 leads

Claude Opus 4.8: 77.4 (#24), Gemini 3.1 Flash Lite: 72.7 (#131)

BenchmarkClaude Opus 4.8Gemini 3.1 Flash Lite
LMArena Instruction Following14761377

Long Context Claude Opus 4.8 leads

Claude Opus 4.8: 45.4 (#35), Gemini 3.1 Flash Lite: 42.5 (#122)

BenchmarkClaude Opus 4.8Gemini 3.1 Flash Lite
LMArena Longer Query14831394

Writing & Preference Claude Opus 4.8 leads

Claude Opus 4.8: 72.0 (#16), Gemini 3.1 Flash Lite: 60.9 (#94)

BenchmarkClaude Opus 4.8Gemini 3.1 Flash Lite
LMArena Text14611416
LMArena Creative Writing14541401
LMArena Multi-Turn14761417
EQ-Bench Creative Writing1840—
EQ-Bench 41281—

Frequently asked questions

Is Claude Opus 4.8 better than Gemini 3.1 Flash Lite?

Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 40.8 on the Noometry Index. Gemini 3.1 Flash Lite costs 18× less per token, which makes it the better buy when Claude Opus 4.8's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 4.8 or Gemini 3.1 Flash Lite?

Gemini 3.1 Flash Lite is cheaper. It lists at $0.25 per million input tokens and $1.50 per million output tokens; Claude Opus 4.8 lists at $5 and $25.

Is Claude Opus 4.8 or Gemini 3.1 Flash Lite better for coding?

Claude Opus 4.8 scores higher on coding benchmarks: 59.9 versus 37.8 in the Noometry coding category.

Which has the bigger context window?

Gemini 3.1 Flash Lite does, with 1.05M tokens against 1M.

How many benchmarks do Claude Opus 4.8 and Gemini 3.1 Flash Lite share?

35 benchmarks have published results for both models. Claude Opus 4.8 has 65 scored results on Noometry and Gemini 3.1 Flash Lite has 38.

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