ZMIME
Comparison · 2 models · Updated Oct 4, 2026

Claude Opus 4 vs Gemini 2.5 Pro

Gemini 2.5 Pro comes out ahead, 63 to 48 on our weighted score, and it is the cheaper option too.

  1. Anthropic

    Claude Opus 4

    Released May 22, 2025

    48/100
    • ECI142.7
    • Price$15.00 / $75.00
    • Context200K
    Full specs Remove Claude Opus 4
  2. Our pick

    Google

    Gemini 2.5 Pro

    Released Jun 17, 2025

    63/100
    • ECI145.3
    • Price$1.25 / $10.00
    • Context1.05M
    Full specs Remove Gemini 2.5 Pro

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Gemini 2.5 Pro is our pick

Gemini 2.5 Pro is the better all-round choice, scoring 63/100 against Claude Opus 4 (48). It leads on capability, price, inputs & features and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityGemini 2.5 ProCapabilities Index (ECI): Gemini 2.5 Pro 145.3 · Claude Opus 4 142.7
  • Lowest priceGemini 2.5 ProGemini 2.5 Pro $3.44 · Claude Opus 4 $30.00 per 1M tokens (3:1 blend)
  • Longest contextGemini 2.5 ProGemini 2.5 Pro 1,048,576 · Claude Opus 4 200,000 tokens
  • Widest inputsGemini 2.5 ProClaude Opus 4: Text, Images, PDFs · Gemini 2.5 Pro: Text, Images, PDFs, Audio, Video
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightClaude Opus 4Gemini 2.5 Pro
CapabilityCapabilities Index (ECI)50%6972
Price25%024
Inputs & features15%70100
Context window10%3261
Overall100%48/10063/100
02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Claude Opus 4 vs Gemini 2.5 Pro specifications side by side
SpecificationClaude Opus 4AnthropicGemini 2.5 ProGoogle
Capability
Capabilities Index (ECI)142.7145.3 (best)
ECI rank#87 of 148#78 of 148 (best)
GPQA DiamondGraduate-level science questions76.3%85.3% (best)
FrontierMath Tiers 1–3Research-level mathematics—24.6%
OTIS Mock AIME 2024–2025Competition mathematics64.4%84.7% (best)
SWE-bench VerifiedFixing real GitHub issues70.7% (best)57.6%
Price per million tokens
Input$15.00$1.25 (best)
Output$75.00$10.00 (best)
Cached input—$0.125
Blended (3:1)$30.00$3.44 (best)
Long-context rateSame rateOver 200K: $2.50 / $15.00
Price sourceMedian of 5 providersOfficial Google API
Limits
Context window200,000 tokens1,048,576 tokens (best)
Max output32,000 tokens65,536 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesYes
AudioNoYes
VideoNoYes
ReasoningYesYes
Tool callingYesYes
Structured outputNoYes
Availability
WeightsProprietaryProprietary
API model ID—gemini-2.5-pro
API providers522 (best)
ReleasedMay 22, 2025Jun 17, 2025
Knowledge cutoffMar 31, 2025Jan 2025
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • Claude Opus 4$300.00
  • Gemini 2.5 Pro$32.50
04 — Questions

Which should you choose?

Which is better: Claude Opus 4 or Gemini 2.5 Pro?

Gemini 2.5 Pro is the better all-round choice, scoring 63/100 against Claude Opus 4 (48). It leads on capability, price, inputs & features and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, Claude Opus 4 or Gemini 2.5 Pro?

Gemini 2.5 Pro is cheaper at $1.25 input / $10.00 output per million tokens (official Google API price). Claude Opus 4 costs $15.00 input / $75.00 output per million tokens (median across 5 API providers). At a typical mix of three input tokens to one output token, that is $3.44 per million tokens for Gemini 2.5 Pro versus $30.00 for Claude Opus 4 (8.7× as much).

Which scores higher on benchmarks?

Gemini 2.5 Pro scores higher on the Capabilities Index (ECI): Gemini 2.5 Pro 145.3 (#78 of 148) and Claude Opus 4 142.7 (#87 of 148). The confidence ranges of the top two overlap (143.6–146.9 vs 140.2–144.2), so treat the gap as small. On individual benchmarks: GPQA Diamond — Gemini 2.5 Pro 85.3%, Claude Opus 4 76.3%; OTIS Mock AIME 2024–2025 — Gemini 2.5 Pro 84.7%, Claude Opus 4 64.4%; SWE-bench Verified — Claude Opus 4 70.7%, Gemini 2.5 Pro 57.6%.

Which is better for coding?

Claude Opus 4 resolves more real GitHub issues on SWE-bench Verified: Claude Opus 4 70.7% and Gemini 2.5 Pro 57.6%. Both support tool calling for agent workflows.

Which has the bigger context window?

Gemini 2.5 Pro has the largest context window at 1,048,576 tokens, against 200,000 for Claude Opus 4. Maximum output per response: Claude Opus 4 up to 32,000, Gemini 2.5 Pro up to 65,536 tokens.

Which can read images, PDFs, audio or video?

Claude Opus 4 accepts text, images and PDFs; Gemini 2.5 Pro accepts text, images, PDFs, audio and video. Gemini 2.5 Pro handles the widest range of inputs.

Are any of these open source?

No. Claude Opus 4 and Gemini 2.5 Pro are proprietary and only available through APIs and apps.

Which is newer?

Gemini 2.5 Pro is the newest, released Jun 17, 2025. Claude Opus 4 came out May 22, 2025. Knowledge cutoff: Claude Opus 4 Mar 31, 2025, Gemini 2.5 Pro Jan 2025.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.

05 — Keep comparing

Related comparisons