Data points: 81
The readout for Gemini 2.5 Pro and GPT-5.1, before the detailed comparison sheet.
Decision read
Gemini 2.5 Pro
Gemini 2.5 Pro currently has the stronger profile, with verified wins split 3 to 2.
Evidence depth
81 data points
Includes 8 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with Gemini 2.5 Pro
The charts below split 18 high-signal samples across speed, scores, and audit health.
Model compare Gemini 2.5 Pro vs GPT-5.1gemini-2-5-pro-vs-gpt-5-1 | Model A Gemini 2.5 Pro | Model B GPT-5.1 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 3 wins | 2 wins |
| Where it leads | Cheapest input price, Provider coverage, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Gemini 2.5 Pro | GPT-5.1 |
|---|---|---|
| LiveCodeBench | 80.1%#18 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 2.5 Pro | GPT-5.1 |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Gemini 2.5 Pro | GPT-5.1 |
|---|---|---|
30 tests | Gemini 2.5 Pro speed / latency 48 tok/s / 23637ms input / output No data |
This report only uses LMSpeed data for Gemini 2.5 Pro and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 2.5 Pro | GPT-5.1 |
|---|---|---|
| When to choose each model | Gemini 2.5 Pro Gemini 2.5 Pro is stronger when you prioritize Cheapest input price, Provider coverage, Recent tests. | GPT-5.1 GPT-5.1 is stronger when you prioritize Average speed, First-token latency. |
TL;DR: Gemini 2.5 Pro leads across 81 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 2.5 Pro vs GPT-5.1 into nearby model comparisons with enough verified LMSpeed data.
| Average speed, First-token latency |
| Model metadata | Gemini 2.5 Pro exposes 1.0M tokens; notable signals: Text input, Image input, File input, Audio input. | GPT-5.1 exposes 400K tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | OpenAI | |
| Context window | 1.0M tokens | 400K tokens |
| Max output | 65.5K tokens | 128K tokens |
| Released | Jun 2025 | Nov 2025 |
| Modalities | Input TextImageFileAudiovideo Output Text | Input ImageTextFile Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputs |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | 2025-01-31 | No data |
| OpenRouter ID | google/gemini-2.5-pro | openai/gpt-5.1 |
| References | No data | No data |
| MMLU-Pro | 86.2%#12 | 87.0%#8 |
|---|
| GPQA | 84.4%#36 | 87.3%#19 |
|---|
| HLE | 21.1%#37 | 26.5%#24 |
|---|
| SciCode | 42.8%#32 | 43.3%#29 |
|---|
| Input price | $1.25/M#30 | $1.25/M#30 |
|---|
| Output speed | 132.3 tok/s#36 | 116.2 tok/s#42 |
|---|
| Output price | $10.00/M#41 | $10.00/M#41 |
|---|
GPT-5.1
speed / latency
N/A / N/A
input / output
No data
N1N10 tests | Gemini 2.5 Pro speed / latency 106 tok/s / 16405ms input / output No data | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data |
|---|
DeepRouter5 tests | Gemini 2.5 Pro speed / latency 92 tok/s / 16347ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
|---|
ModelPool5 tests | Gemini 2.5 Pro speed / latency 81 tok/s / 21179ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
|---|
Rnglg2 API5 tests | Gemini 2.5 Pro speed / latency 111 tok/s / 17899ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
|---|
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $0.0006/M / $0.0050/M | GPT-5.1 gpt-5.1-chat speed / latency No data input / output $0.037/M / $0.300/M |
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $0.0006/M / $0.0050/M | GPT-5.1 gpt-5.1-chat speed / latency No data input / output $0.037/M / $0.300/M |
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $0.014/M / $0.904/M | GPT-5.1 gpt-5.1 speed / latency No data input / output $0.041/M / $0.329/M |
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $0.014/M / $0.014/M | GPT-5.1 gpt-5.1-openai-compact speed / latency No data input / output $10.27/M / $10.27/M |
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $0.034/M / $0.274/M | GPT-5.1 gpt-5.1-medium speed / latency No data input / output $0.017/M / $0.137/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
