How much does Gemini 2.5 Flash (Sep 2025) cost?

Gemini 2.5 Flash (Sep 2025) costs $0.30 per million input tokens and $2.50 per million output tokens, using the list price from Google as of 26 Oct 2026. That is about $0.15 for 100 chats of about 1,000 tokens in and 500 tokens back. Confirm on the maker's site before you buy, because prices change.

What is the context window of Gemini 2.5 Flash (Sep 2025)?

Gemini 2.5 Flash (Sep 2025) has a context window of 1M tokens, roughly 786,000 words of text read at once. A single answer can be up to 66K tokens long.

Is Gemini 2.5 Flash (Sep 2025) open source?

We list Gemini 2.5 Flash (Sep 2025) as closed: it is used through its maker's apps or API and its weights are not published (Epoch AI lists its access as "API access").

How good is Gemini 2.5 Flash (Sep 2025) compared with other AI models?

On the Epoch Capabilities Index, Gemini 2.5 Flash (Sep 2025) scores 142.9 (likely range 139.1 to 146.2), which ranks 103 of 270 models we track. On Arena's human-vote text board it is ranked 98 of 166. Scores close together are a tie in practice.

How does Gemini 2.5 Flash (Sep 2025) compare with Qwen 3.6 Flash?

Gemini 2.5 Flash (Sep 2025) scores higher on 1 of 2 shared quality measures, Qwen 3.6 Flash on 0. 1 measure is too close to call. See the full comparison for every measure.

How current are these numbers for Gemini 2.5 Flash (Sep 2025)?

The newest data on this page is dated 26 Oct 2026. Scores come from Epoch AI and Arena, prices from the open LiteLLM price list.

AI Rankings

Gemini 2.5 Flash (Sep 2025): Score, Price and Context Window

Where Gemini 2.5 Flash (Sep 2025) from Google ranks, what it costs and how much text it can read, in plain numbers with the sources.

Data updated 26 Oct 2026

Google
Closed weights
Released Sep 2025

Its score range overlaps with Gemma 4 31B IT, the model just above it, so a small gap in rank is not a meaningful difference.

Best for

Very long documents: its context window is 1M tokens, roughly 786,000 words.

These lines are worked out from the numbers on this page, not from hands-on testing.

Key facts

Overall score: 142.9; Rank 103 of 270. Likely range 139.1 to 146.2.
Human preference: chat: 1409; Rank 98 of 166. 125,462 votes.
Human preference: coding: 1427; Rank 116 of 166. 6,913 votes.
Human preference: images: 1230; Rank 56 of 85. 4,792 votes.
Price per million tokens: $0.30 in / $2.50 out; Blended $0.85. Cached input $0.03. List price from Google, checked 26 Oct 2026.
Context window: 1M tokens; About 786,000 words at once. One answer up to 66K tokens.
Weights: Closed; Used through the maker's apps or API (Epoch AI: API access).

Features listed by the price list: Image input, PDF input, Audio input, Tool use, Reasoning, Web search, Prompt caching, Structured output.

Try itGoogle Gemini in our AI tools directoryGoogle's AI assistant for writing, planning, research, and multimodal tasks, with optional Google AI subscriptions.

How Gemini 2.5 Flash (Sep 2025) stacks up

Each strip shows every model we track as faint bars. The dot is this model. Better is always to the right, even for price.

Gemini 2.5 Flash (Sep 2025) compared with all models we trackOverall capability: 142.9. Better than 62% of the other 269 models. Human preference: chat: 1409. Better than 41% of the other 165 models. Human preference: coding: 1427. Better than 30% of the other 165 models. Human preference: images: 1230. Better than 34% of the other 84 models. Price: $0.85 per 1M. Cheaper than 56% of the other 200 priced models. Context window: 1M tokens. Larger context window than 84% of the other 198 models.

Overall capability142.9
Better than 62% of the other 269 modelsUpper half
Epoch Capabilities Index: one score that combines many tests.
Human preference: chat1409
Better than 41% of the other 165 models
How often people pick its answers over another model's on Arena.
Human preference: coding1427
Better than 30% of the other 165 models
How often people pick its answers to coding questions on Arena.
Human preference: images1230
Better than 34% of the other 84 models
How often people pick its answers about pictures on Arena.
Price$0.85 per 1M
Cheaper than 56% of the other 200 priced modelsUpper half
Blended price per million tokens. Lower is better, so the cheapest models sit on the right.
Context window1M tokens
Larger context window than 84% of the other 198 modelsTop 25%
How much text it can read at once. Bigger suits long documents.

Compared with the other published models that have each measure. Data updated 26 Oct 2026.

Where Gemini 2.5 Flash (Sep 2025) ranks

Leaderboards it appears on, best placing first.

See all leaderboards

Test results

Each test checks one kind of skill. Place shows where it stands among the models that took that test.

SimpleBench
Everyday common-sense and trick questions that most people answer correctly but AI models often get wrong.
41.2%
Place 50 of 80
Terminal-Bench
Tasks done in a computer terminal, such as setting up software or fixing a broken build, checked by automatic tests. Scores here use the benchmark's standard reference agent so models are compared on the same footing.
16.9%
Place 23 of 25

What it costs in everyday terms

List prices turned into amounts you can picture. Real bills depend on how you use it.

100 chats: $0.15; Cost of 100 chats assumes each chat sends 1,000 tokens (about 750 words) and gets 500 tokens (about 375 words) back.
A 300-page book: $0.03; Cost to read a 300-page book assumes about 100,000 input tokens and no reply. A real book varies with page size and language.
Blended price: $0.85 per 1M; Three parts input to one part output. Our own calculation for comparing models.

Similar models

Models from other makers with a similar overall score.

Learn more

Questions about Gemini 2.5 Flash (Sep 2025)

How much does Gemini 2.5 Flash (Sep 2025) cost?: Gemini 2.5 Flash (Sep 2025) costs $0.30 per million input tokens and $2.50 per million output tokens, using the list price from Google as of 26 Oct 2026. That is about $0.15 for 100 chats of about 1,000 tokens in and 500 tokens back. Confirm on the maker's site before you buy, because prices change.
What is the context window of Gemini 2.5 Flash (Sep 2025)?: Gemini 2.5 Flash (Sep 2025) has a context window of 1M tokens, roughly 786,000 words of text read at once. A single answer can be up to 66K tokens long.
Is Gemini 2.5 Flash (Sep 2025) open source?: We list Gemini 2.5 Flash (Sep 2025) as closed: it is used through its maker's apps or API and its weights are not published (Epoch AI lists its access as "API access").
How good is Gemini 2.5 Flash (Sep 2025) compared with other AI models?: On the Epoch Capabilities Index, Gemini 2.5 Flash (Sep 2025) scores 142.9 (likely range 139.1 to 146.2), which ranks 103 of 270 models we track. On Arena's human-vote text board it is ranked 98 of 166. Scores close together are a tie in practice.
How does Gemini 2.5 Flash (Sep 2025) compare with Qwen 3.6 Flash?: Gemini 2.5 Flash (Sep 2025) scores higher on 1 of 2 shared quality measures, Qwen 3.6 Flash on 0. 1 measure is too close to call. See the full comparison for every measure.
How current are these numbers for Gemini 2.5 Flash (Sep 2025)?: The newest data on this page is dated 26 Oct 2026. Scores come from Epoch AI and Arena, prices from the open LiteLLM price list.

Where this data comes from

Epoch AI: Benchmark data: Epoch AI, 'Capabilities & benchmarking', epoch.ai/benchmarks (CC BY 4.0). We match models across sources, rank them and show them in charts. Scores are not changed. Epoch AI does not endorse this site.
Arena (formerly LMArena): Human-preference ratings: Arena (arena.ai) leaderboard dataset, CC BY 4.0. We keep the latest published ratings, match them to models from other sources and rank them. Ratings are not changed. Arena does not endorse this site.
LiteLLM model price list: Prices and context windows: LiteLLM model price list (github.com/BerriAI/litellm, MIT licence). We use the model maker's own price entry when there is one. Prices change often, so always confirm on the maker's site before you buy.

Newest data on this page: 26 Oct 2026. Prices are list prices and change often, so confirm on the maker's site before you buy. Sponsors never change a score or an order. How we calculate this · Report a mistake