Gemini 2.5 Flash vs Gemini 3.5 Flash Lite
63.9 overall · $0.850 / 1M
Gemini 2.5 Flash
google/gemini-2.5-flash
reasoningtool callingfile inputimage inputaudio inputvideo inputprompt caching
Gemini 2.5 Flash costs $0.300 per 1M input tokens and $2.50 per 1M output tokens with a 1.0M-token context window.
A reasoning, tool-calling model from google, released Jun 17, 2025. LiveBench hasn't published a run for it, so this page carries measured price and specs only — no benchmark numbers.
- Input / 1M
- $0.300
- Output / 1M
- $2.50
- Context
- 1.0M
- LiveBench overall
- Not evaluated
Specs and pricing
| Input price USD per 1M prompt tokens | $0.300 |
|---|---|
| Output price USD per 1M completion tokens, reasoning included | $2.50 |
| Blended price 3:1 input:output — #153 most expensive of 343 listed models | $0.850 |
| Cached input read Blank means not priced separately — not free | $0.030 |
| Cache write | $0.083 |
| Context window | 1,048,576 tokens |
| Max output | 65,535 tokens |
| Input modalities | file, image, text, audio, video |
| Tool calling | Yes |
| Extended reasoning | Yes |
| Knowledge cutoff | 2025-01-31 |
| Listed | Jun 17, 2025 |
Also listed as google/gemini-2.5-flash:batch ($0.425 blended)— the same model at a different price or rate limit.
What Gemini 2.5 Flash costs to run
Monthly list cost across five workload shapes, using the published cached-input rate where there is one. A floor, not a quote — batch discounts and cache writes aren't included.
| Workload | Per month |
|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $252.56/mo |
| RAG assistant 8K in / 600 out × 100K requests | $282.00/mo |
| Coding agent 40K in / 4K out × 20K requests | $288.80/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $474.00/mo |
| Bulk classification 500 in / 20 out × 5M requests | $865.00/mo |
Compare Gemini 2.5 Flash with
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Gemini 2.5 Flash vs DeepSeek V4 Pro 0813
77.4 overall · $0.990 / 1M
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Gemini 2.5 Flash vs GLM 5.2
73.2 overall · $0.998 / 1M
Gemini 2.5 Flash FAQ
How much does Gemini 2.5 Flash cost?
Gemini 2.5 Flash lists at $0.300 per 1M input tokens and $2.50 per 1M output tokens, with cached input reads at $0.030 per 1M. A RAG assistant handling 100K requests a month (8K tokens in, 600 out) comes to about $282.00 at list price.
What is the context window of Gemini 2.5 Flash?
Gemini 2.5 Flash accepts up to 1,048,576 tokens of context and can return up to 65,535 output tokens per response.
Does Gemini 2.5 Flash support tool calling?
Yes — Gemini 2.5 Flash supports tool (function) calling and exposes extended reasoning. It accepts file, image, text, audio, video input.
How does Gemini 2.5 Flash score on benchmarks?
LiveBench has not published a run for Gemini 2.5 Flash yet. Until it does, compare it on price and specs, or run your own evaluation on your own tasks.
What is the API model ID for Gemini 2.5 Flash?
On OpenRouter the model ID is "google/gemini-2.5-flash". It was listed on Jun 17, 2025.
More from google
How these numbers are produced
- Price and specs — provider list data from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores and ranks — LiveBench release 2026-06-25. Ranks count only models that have a published run; a blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.