Gemini 2.5 Flash vs Gemini 2.5 Pro
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Gemini 2.5 Flash
Google · Jun 2025
The 2025 fast-tier favorite: hybrid reasoning, full multimodality and a 1M context at $0.30/$2.50.
Gemini 2.5 Pro
70.9Google · Mar 2025
Google's 2025 workhorse flagship — first mainstream thinking model with a 1M context, still widely deployed.
The verdict
Gemini 2.5 Pro wins 3 of the 3 benchmarks these models share, against 0 for Gemini 2.5 Flash. On price the gap is dramatic: Gemini 2.5 Flash works out roughly 4.0x cheaper per blended million tokens.
Benchmark head-to-head 0–3
Specs & pricing
| Gemini 2.5 Flash | Gemini 2.5 Pro | |
|---|---|---|
| modhub Index | — | 70.9 |
| Input price / 1M | $0.3 | $1.25 |
| Output price / 1M | $2.5 | $10 |
| Context window | 1.0M | 1.0M |
| Max output | 66K | 66K |
| Open weights | no | no |
| Reasoning model | yes | yes |
| Multimodal input | text, image, audio, video | text, image, audio, video |
| Knowledge cutoff | Jan 2025 | Jan 2025 |
| Released | Jun 2025 | Mar 2025 |
| Example monthly cost* | $6.75 | $27.50 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Gemini 2.5 Flash or Gemini 2.5 Pro?
- Gemini 2.5 Pro wins 3 of the 3 benchmarks these models share, against 0 for Gemini 2.5 Flash. On price the gap is dramatic: Gemini 2.5 Flash works out roughly 4.0x cheaper per blended million tokens.
- Which is cheaper, Gemini 2.5 Flash or Gemini 2.5 Pro?
- Gemini 2.5 Flash costs $0.3/$2.5 per million input/output tokens, while Gemini 2.5 Pro costs $1.25/$10. For a typical workload of 10M input and 1.5M output tokens per month, that's $6.75 versus $27.50.
- Which model is better for coding, Gemini 2.5 Flash or Gemini 2.5 Pro?
- On SWE-bench Verified — the standard agentic-coding benchmark — Gemini 2.5 Pro scores 63.8% versus ~48.9% for Gemini 2.5 Flash, making Gemini 2.5 Pro the stronger pick for coding agents.
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