// head_to_head
Gemini 2.5 Flash vs Gemini 3.5 Flash Lite
Published LiveBench scores across all seven categories, live list pricing, context windows, and the measured cost of a point of capability — for both models, side by side.
Gemini 2.5 Flash and Gemini 3.5 Flash Lite are priced within ~10% of each other.
Gemini 2.5 Flash does not have a published LiveBench run, so this comparison covers price, context and declared capabilities only. A missing score means "not evaluated", not "worse" — the right way to separate these two is an eval on your own workload.
Gemini 2.5 Flash
- Blended / 1M
- $0.850
- Context
- 1.0M
- Released
- Jun 17, 2025
- Overall score
- Not evaluated
Gemini 3.5 Flash Lite
- Blended / 1M
- $0.850
- Context
- 1.0M
- Released
- Jul 21, 2026
- Overall score
- 63.9
Specs and pricing
| Metric | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| LiveBench overall Mean of the seven LiveBench category scores, 0–100. Higher is better. | — | 63.9 |
| Cost per point Measured benchmark spend divided by overall score — dollars per point of capability. | — | $0.0379 |
| Blended price / 1M 3:1 input:output mix, the usual shape of production traffic. | $0.850 | $0.850 |
| Input price / 1M | $0.300 | $0.300 |
| Output price / 1M | $2.50 | $2.50 |
| Cached input / 1M Price of an input token served from the prompt cache, where the provider publishes one. | $0.030 | $0.030 |
| Context window | 1.0M | 1.0M |
| Max output tokens | 66K | 66K |
Benchmarks by category
An overall score averages away the thing you probably care about. These are the seven LiveBench categories scored separately — Gemini 2.5 Flash on top, Gemini 3.5 Flash Lite below, both out of 100.
What each one costs to run
Per-token prices are hard to feel. These are monthly list costs for both models across five workload shapes, using each provider's published cached-input rate where there is one.
| Workload | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $252.56/mo | $252.56/mo |
| RAG assistant 8K in / 600 out × 100K requests | $282.00/mo | $282.00/mo |
| Coding agent 40K in / 4K out × 20K requests | $288.80/mo | $288.80/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $474.00/mo | $474.00/mo |
| Bulk classification 500 in / 20 out × 5M requests | $865.00/mo | $865.00/mo |
Gemini 2.5 Flash vs Gemini 3.5 Flash Lite FAQ
Which is better, Gemini 2.5 Flash or Gemini 3.5 Flash Lite?
Gemini 2.5 Flash and Gemini 3.5 Flash Lite are priced within ~10% of each other. Gemini 2.5 Flash does not have a published LiveBench run, so this comparison covers price, context and declared capabilities only. A missing score means "not evaluated", not "worse" — the right way to separate these two is an eval on your own workload.
Is Gemini 2.5 Flash cheaper than Gemini 3.5 Flash Lite?
They cost about the same. Both land near $0.850 per million tokens on a 3:1 input:output blend, so price is unlikely to be the deciding factor between them.
Does Gemini 2.5 Flash or Gemini 3.5 Flash Lite have a bigger context window?
They are effectively the same — 1.0M for Gemini 2.5 Flash and 1.0M for Gemini 3.5 Flash Lite.
Do Gemini 2.5 Flash and Gemini 3.5 Flash Lite support prompt caching?
Both publish a cached-input rate: $0.030 per million for Gemini 2.5 Flash and $0.030 for Gemini 3.5 Flash Lite, against full input rates of $0.300 and $0.300. On a workload with a long stable prefix — a system prompt, a tool schema, a retrieved corpus — that changes the economics more than the headline price does.
Related comparisons
How these numbers are produced
- Price — provider list price from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores — LiveBench release 2026-06-25, using their own category map. Each model shows its strongest 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.
- “Win” — awarded only past a threshold: one full point on a benchmark score, 10% on a price, 25% on a context window. Anything tighter reports as a tie, because effort settings alone move a LiveBench score by more than that.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.