Data points: 65
The readout for Gemini 2.5 Pro and GPT-5.3, before the detailed comparison sheet.
Decision read
Gemini 2.5 Pro
Gemini 2.5 Pro currently has the stronger profile, with verified wins split 5 to 1.
Evidence depth
65 data points
Includes 0 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with Gemini 2.5 Pro
The charts below split 9 high-signal samples across speed, scores, and audit health.
Model compare Gemini 2.5 Pro vs GPT-5.3gemini-2-5-pro-vs-gpt-5-3 | Model A Gemini 2.5 Pro | Model B GPT-5.3 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 5 wins | 1 wins |
| Where it leads | Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests | First-token latency |
| Model metadata | Gemini 2.5 Pro exposes 1.0M tokens; notable signals: Text input, Image input, File input, Audio input. | GPT-5.3 exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | OpenAI | |
| Context window | 1.0M tokens | 128K tokens |
| Max output | 65.5K tokens | 16.4K tokens |
| Released | Jun 2025 | Mar 2026 |
| Modalities | Input TextImageFileAudiovideo Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | 2025-01-31 | No data |
| OpenRouter ID | google/gemini-2.5-pro | openai/gpt-5.3-chat |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Gemini 2.5 Pro | GPT-5.3 |
|---|---|---|
| No shared benchmark metrics are available yet. | ||
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 2.5 Pro | GPT-5.3 |
|---|---|---|
| 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-5.3 |
|---|---|---|
N1N10 tests | Gemini 2.5 Pro speed / latency 106 tok/s / 16405ms input / output No data | GPT-5.3 speed / latency 56 tok/s / 2764ms input / output No data |
小水管 API10 tests | Gemini 2.5 Pro speed / latency N/A / N/A input / output No data | GPT-5.3 speed / latency 64 tok/s / 2635ms input / output No data |
CaMeL AI5 tests | Gemini 2.5 Pro speed / latency N/A / N/A input / output No data | GPT-5.3 speed / latency 51 tok/s / 2246ms input / output No data |
DeepRouter5 tests | Gemini 2.5 Pro speed / latency 92 tok/s / 16347ms input / output No data | GPT-5.3 speed / latency N/A / N/A input / output No data |
91VIP API0 tests | Gemini 2.5 Pro gemini-2.5-pro speed / latency N/A / N/A input / output $1.25/M / $10.00/M | GPT-5.3 gpt-5-3 speed / latency N/A / N/A input / output $0.080/M / $0.080/M |
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $0.014/M / $0.014/M | GPT-5.3 gpt-5.3-chat-latest speed / latency No data input / output $0.240/M / $1.92/M | |
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $0.051/M / $0.411/M | GPT-5.3 gpt-5.3-chat-latest speed / latency No data input / output $0.072/M / $0.575/M | |
Gemini 2.5 Pro gemini-2.5-pro-c speed / latency No data input / output $0.100/M / $0.100/M | GPT-5.3 gpt-5.3-chat speed / latency No data input / output $1.75/M / $14.00/M | |
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $0.411/M / $4.11/M | GPT-5.3 gpt-5-3 speed / latency No data input / output $0.137/M / $1.10/M |
This report only uses LMSpeed data for Gemini 2.5 Pro and GPT-5.3: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 2.5 Pro | GPT-5.3 |
|---|---|---|
| When to choose each model | Gemini 2.5 Pro Gemini 2.5 Pro is stronger when you prioritize Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests. | GPT-5.3 GPT-5.3 is stronger when you prioritize First-token latency. |
TL;DR: Gemini 2.5 Pro leads across 65 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 2.5 Pro vs GPT-5.3 into nearby model comparisons with enough verified LMSpeed data.
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
