Gemini 2.5 Pro vs GPT-5
Pricing, benchmarks, and use case comparison
Quick take
- •Gemini 2.5 Pro is meaningfully stronger at long context (90 vs 80 on our capability index).
- •GPT-5 is meaningfully stronger at cost efficiency (88 vs 70).
- •GPT-5 has a 400,000 tokens (128,000 max output) context window vs 1,048,576 tokens (1M) input; up to 65K output - better for whole-repo or long-document work.
Specs comparison
| Gemini 2.5 Pro | GPT-5 | |
|---|---|---|
| Provider | Google DeepMind | OpenAI |
| Type | Closed source | Closed source |
| Context window | 1,048,576 tokens (1M) input; up to 65K output | ✓400,000 tokens (128,000 max output) |
| Input / 1M tokens | $1.25 | $1.25 |
| Output / 1M tokens | $10.00 | $10.00 |
| Release date | 2025-06 | 2025-08 |
Benchmarks
| Benchmark | Gemini 2.5 Pro | GPT-5 |
|---|---|---|
| Context window | 1M tokens | - |
| Pricing tier break | 200K tokens | - |
| SWE-bench Verified | - | 74.9% |
| AIME 2025 | - | 94.6% |
| GPQA (GPT-5 pro) | - | 88.4% |
Scores sourced from official provider release posts and independent benchmark aggregators.
Which should you choose?
Choose Gemini 2.5 Pro if...
- →Complex reasoning, analysis, or STEM tasks that benefit from a thinking model
- →Processing very long inputs (long documents, large repos)
- →Multimodal tasks needing high quality
Choose GPT-5 if...
- →You want strong reasoning at the lowest frontier-model price
- →Existing GPT-5-based systems that are already tuned and validated
- →General coding, math, and reasoning workloads on a budget