Model comparison
Claude 4 Sonnet vs Gemini 2.5 Pro
Head-to-head evidence from 15 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude 4 Sonnet #158 (Supported); Gemini 2.5 Pro #70 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude 4 Sonnet and Gemini 2.5 Pro share 15 comparable benchmark results. 1 of 8 categories are comparable. 1 result is unique to Claude 4 Sonnet; 9 to Gemini 2.5 Pro.
Updated July 20, 2026- Shared results
- 15
- Claude 4 Sonnet only
- 1
- Gemini 2.5 Pro only
- 9
- Comparable categories
- 1 / 8
Pick Gemini 2.5 Pro if you want the stronger benchmark profile. Claude 4 Sonnet only becomes the better choice if coding is the priority.
Confidence note. This is a partial-evidence comparison with 15 shared benchmark results across 6 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Gemini 2.5 Pro is clearly ahead on the BenchAlign aggregate, 57.25 to 42.79. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude 4 Sonnet is also the more expensive model on tokens at $3.00 input / $15.00 output per 1M tokens, versus $1.25 input / $10.00 output per 1M tokens for Gemini 2.5 Pro. Gemini 2.5 Pro gives you the larger context window at 1M, compared with 200K for Claude 4 Sonnet.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude 4 Sonnet | Δ | Gemini 2.5 Pro |
|---|---|---|---|
| Coding | Claude 4 Sonnet72.7 | Margin← 8.9 | Gemini 2.5 Pro63.8 |
| Knowledge | Claude 4 SonnetNot measured | MarginNo overlap | Gemini 2.5 Pro27.4 |
| Math | Claude 4 SonnetNot measured | MarginNo overlap | Gemini 2.5 Pro11.6 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
SWE-bench Verified
CodingA 72.7%B 63.8%Winner: Claude 4 SonnetΔ 8.9SWE-bench Verified: Claude 4 Sonnet scored 72.7%; Gemini 2.5 Pro scored 63.8%. Claude 4 Sonnet wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude 4 Sonnet | Gemini 2.5 Pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude 4 Sonnet$3 input / $15 output | Gemini 2.5 Pro$1.25 input / $10 output | Gemini 2.5 Pro has the lower combined listed price. |
| Generation speedtokens per second | Claude 4 Sonnet40 tok/s | Gemini 2.5 Pro117 tok/s | Gemini 2.5 Pro has the higher measured throughput. |
| First-answer latencyseconds to first token | Claude 4 Sonnet1.33 s | Gemini 2.5 Pro21.19 s | Claude 4 Sonnet reaches the first token sooner. |
| Context windowmaximum listed tokens | Claude 4 Sonnet200K | Gemini 2.5 Pro1M | Gemini 2.5 Pro lists the larger context window. |
Benchmark Deep Dive
Agentic6 benchmarks
CodingClaude 4 Sonnet wins4 benchmarks
Reasoning2 benchmarks
Knowledge8 benchmarks
| Benchmark | Claude 4 Sonnet | Gemini 2.5 Pro | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 25.5% | 25.8% | Gemini 2.5 Pro leads |
| AA-GPQA DiamondSource | 68.3% | 84.4% | Gemini 2.5 Pro leads |
| AA-HLESource | 4.0% | 21.1% | Gemini 2.5 Pro leads |
| AA-Omniscience IndexSource | -9.2% | -14.3% | Claude 4 Sonnet leads |
| AA-Omniscience AccuracySource | 22.4% | 39.0% | Gemini 2.5 Pro leads |
| AA-Omniscience Hallucination RateSource | 40.8% | 87.4% | Claude 4 Sonnet leads |
| GPQASource | — | 83% | Not comparable |
| HLESource | — | 18.8% | Not comparable |
Math2 benchmarks
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude 4 Sonnet | Gemini 2.5 Pro | Result |
|---|---|---|---|
| AA-IFBenchSource | 45.4% | 48.7% | Gemini 2.5 Pro leads |
Frequently Asked Questions (2)
Which is better, Claude 4 Sonnet or Gemini 2.5 Pro?
Gemini 2.5 Pro is ahead on BenchLM's BenchAlign leaderboard, 57.25 to 42.79. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 72.7% and 63.8%.
Which is better for coding, Claude 4 Sonnet or Gemini 2.5 Pro?
Claude 4 Sonnet has the edge for coding in this comparison, averaging 72.7 versus 63.8. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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