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Claude 4 Opus vs Gemini 2.5 Flash Preview: Benchmarks, Pricing, and Context Window Comparison

Claude 4 Opus vs Gemini 2.5 Flash Preview compares provider, context window, token pricing, benchmark performance, and release timeline in one side-by-side view. Use this page to quickly identify which model is a better fit for your production constraints, quality targets, and estimated cost per request.

Verdict

Gemini 2.5 Flash Preview has lower listed token pricing, while Claude 4 Opus can still be preferable if benchmark results better match your workload.

Author: Mirai Minds Research Team

Last updated:

Sources

Compare
Claude 4 Opus
to
Gemini 2.5 Flash Preview
Overview
Claude 4 Opus was released 2 months after Gemini 2.5 Flash Preview.
Claude 4 Opus
Gemini 2.5 Flash Preview
Provider
The entity that provides this model.
Anthropic
Google
Input Context Window
The number of tokens supported by the input context window.
200K
tokens
1,048,576
tokens
Maximum Output Tokens
The number of tokens that can be generated by the model in a single request.
32,000
tokens
65,536
tokens
Release Date
When the model was first released.
2025-05-22
2025-04-17
Leaderboard
Claude 4 Opus
Gemini 2.5 Flash Preview
Rank
Unknown
Unknown
Arena Elo
Not specified.
Not specified.
95% CI
Not specified.
Not specified.
Votes
Not specified.
Not specified.
License
Not specified.
Not specified.
Knowledge Cutoff
Unknown
Unknown
Pricing
Claude 4 Opus
Gemini 2.5 Flash Preview
Input
Cost of input data provided to the model.
$15
per million tokens
$0.15
per million tokens
Output
Cost of output tokens generated by the model.
$75
per million tokens
$0.60
per million tokens
Benchmarks
Compare relevant benchmarks between Claude 4 Opus and Gemini 2.5 Flash Preview Instruct.
Claude 4 Opus
Gemini 2.5 Flash Preview
MMLU
Evaluating LLM knowledge acquisition in zero-shot and few-shot settings.
Benchmark not available.
88.4
(5-shot)
Source
MMMU
A wide ranging multi-discipline and multimodal benchmark.
76.5
Source
76.7
Source
HellaSwag
A challenging sentence completion benchmark.
Benchmark not available.
Benchmark not available.

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sneh[at]miraiminds.co

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Mirai Minds