tokevenClaudevsGemini
Claude Opus 4.8 vs Gemini 3.1 Pro
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Opus 4.8
FlagshipGemini 3.1 Pro
Mid-tierInput $/MTok
$5.00
$2.00
Output $/MTok
$25.00
$12.00
Cache discount
90% off
90% off
Context
1M
1.0M
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
63
vs
57
Code Review
94
vs
84
Summarization
69
vs
80
Q&A
85
vs
87
Extraction
73
vs
75
Reasoning
89
vs
84
Classification
80
vs
86
Creative Writing
81
vs
77
Claude Opus 4.8
Gemini 3.1 Pro
Guidance
When to use Claude Opus 4.8 vs Gemini 3.1 Pro
Choose Claude Opus 4.8 when...
- -You need strong code review (confidence 94 vs 84)
- -You need strong reasoning (confidence 89 vs 84)
- -You need strong creative writing (confidence 81 vs 77)
- -You need strong code generation (confidence 63 vs 57)
Choose Gemini 3.1 Pro when...
- -You need strong q&a (confidence 87 vs 85)
- -You need strong classification (confidence 86 vs 80)
- -You need strong summarization (confidence 80 vs 69)
- -You need strong extraction (confidence 75 vs 73)
- -Cost matters: 60% cheaper on input tokens
- -You need a larger context window (1.0M vs 1M)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Opus 4.8
Gemini 3.1 Pro
100K tokens
$1.10
$0.50Cheaper
1M tokens
$11.00
$8.20Cheaper
10M tokens
$110.00
$82.00Cheaper
FAQ
When should I use Claude Opus 4.8 instead of Gemini 3.1 Pro?
Claude Opus 4.8 outperforms Gemini 3.1 Pro for Code Generation, Code Review, Reasoning. It costs $5.00/$25.00 per million tokens (input/output).
Is Gemini 3.1 Pro cheaper than Claude Opus 4.8?
Yes. Gemini 3.1 Pro input costs $2.00/MTok vs $5.00/MTok for Claude Opus 4.8, saving 60% on input.
What are the context window sizes for Claude Opus 4.8 and Gemini 3.1 Pro?
Claude Opus 4.8 has a 1M token context window. Gemini 3.1 Pro has a 1.0M token context window.
Go deeper on either model
Per-call cost calculators, provider lineups, and price history for both models on this page.
Other comparisons
How Claude Opus 4.8 and Gemini 3.1 Pro stack up against the rest of the field.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.