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Four models, one page
Pick the models you are actually choosing between. Every row is scaled within itself, so a bar means something next to its neighbours and nothing across rows.
| Specification | Gemini 2.5 FlashGoogle | Claude Opus 5Anthropic |
|---|---|---|
| Released | Jun 17, 2025 | Jul 24, 2026 |
| Context window | 1.05M | 1M |
| Max output | 66K | 128K |
| Input / 1M | $0.3 | $5 |
| Output / 1M | $2.5 | $25 |
| Cost per task | $0.22 | $2.25 |
| Arena Elo | 1,097 | 1,393 |
| Serving providers | 2 | 5 |
| Parameters | Undisclosed | Undisclosed |
| Licence | Proprietary | Proprietary |
| Capabilities |
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Metrics side by side
Each row is scaled to the largest value in that row — bars compare within a row, never across rows
- Gemini 2.5 Flash
- Claude Opus 5
Intelligence Index
Gemini 2.5 Flash14.2Claude Opus 563.1Coding Index
Gemini 2.5 Flashnot measuredClaude Opus 578.0Agentic Index
Gemini 2.5 Flashnot measuredClaude Opus 559.2Output speed
Gemini 2.5 Flash92 t/sClaude Opus 587 t/sContext window
Gemini 2.5 Flash1.05MClaude Opus 51MLatency · lower is better
Gemini 2.5 Flash516msClaude Opus 51.12sBlended price / 1M · lower is better
Gemini 2.5 Flash$0.85Claude Opus 5$10Cost per task · lower is better
Gemini 2.5 Flash$0.22Claude Opus 5$2.25
Rows marked “lower is better” still draw a longer bar for a larger number — read the value, not just the length. Arena Elo is in the specification table above instead: it has no meaningful zero, so a bar would flatten the gaps.
View as table
| Metric | Gemini 2.5 Flash | Claude Opus 5 |
|---|---|---|
| Intelligence Index | 14.2 | 63.1 |
| Coding Index | — | 78.0 |
| Agentic Index | — | 59.2 |
| Output speed | 92 t/s | 87 t/s |
| Context window | 1.05M | 1M |
| Latency · lower is better | 516ms | 1.12s |
| Blended price / 1M · lower is better | $0.85 | $10 |
| Cost per task · lower is better | $0.22 | $2.25 |
Evaluation scores
Percentage correct on a common 0–100% scale
- Gemini 2.5 Flash
- Claude Opus 5
GPQA Diamond
Gemini 2.5 Flash68.3%Claude Opus 593.2%Humanity's Last Exam
Gemini 2.5 Flash4.7%Claude Opus 554.9%SciCode
Gemini 2.5 Flash29.1%Claude Opus 555.7%τ²-bench
Gemini 2.5 Flash14.9%Claude Opus 542.1%Terminal-Bench Hard
Gemini 2.5 Flash12.1%Claude Opus 5not measuredLiveCodeBench
Gemini 2.5 Flash49.5%Claude Opus 5not measuredAA-LCR long context
Gemini 2.5 Flash48.0%Claude Opus 575.7%AIME 2025
Gemini 2.5 Flash60.3%Claude Opus 5not measured
A missing bar means that evaluation was not run for that model — it is not a zero.
View as table
| Evaluation | Gemini 2.5 Flash | Claude Opus 5 |
|---|---|---|
| GPQA Diamond | 68.3% | 93.2% |
| Humanity's Last Exam | 4.7% | 54.9% |
| SciCode | 29.1% | 55.7% |
| τ²-bench | 14.9% | 42.1% |
| Terminal-Bench Hard | 12.1% | — |
| LiveCodeBench | 49.5% | — |
| AA-LCR long context | 48.0% | 75.7% |
| AIME 2025 | 60.3% | — |
Estimated from list pricing: 50K input tokens plus 80K output tokens for reasoning models (25K for non-reasoning).