Model Tracker

Gemini 2.5 Flash

Gemini 2.5 Flash is an AI model made by Google. Google released it on 17 April 2025. It takes text, image, audio, video and returns text.

Google

Gemini 2.5 Flash is an AI model made by Google. Google released it on 17 April 2025. It takes text, image, audio, video and returns text. Its context window is 1,048,576 tokens. Its longest answer is 65,536 tokens. Through the API it costs $0.30 per 1M tokens for input and $2.50 per 1M tokens for output. Its knowledge cutoff is January 2025.

Released: 17 April 2025 — blog.google, read 16 October 2026
Status: Not confirmed: two readings disagree: ga and retired
Takes: Text, Image, Audio, Video — ai.google.dev, read 16 October 2026
Returns: Text — ai.google.dev, read 16 October 2026
Open weights: Not confirmed: The cited maker pages do not state whether downloadable weights are available.
Licence: Not confirmed: The cited maker pages do not name a licence for Gemini 2.5 Flash.
Context window: 1,048,576 tokens — ai.google.dev, read 16 October 2026
Longest answer: 65,536 tokens — ai.google.dev, read 16 October 2026
Knowledge cutoff: January 2025 — ai.google.dev, read 16 October 2026
API price, input: $0.30 per 1M tokens — ai.google.dev, read 16 October 2026
API price, output: $2.50 per 1M tokens — ai.google.dev, read 16 October 2026
Where: Not confirmed: two readings disagree: api, app, cloud and api, cloud
Parameters: Not confirmed: The cited maker pages do not publish a parameter count.
Model card: https://storage.googleapis.com/deepmind-media/Model-Cards/Gemini-2-5-Flash-Model-Card.pdf — storage.googleapis.com, read 16 October 2026

Benchmarks

Measured by others, not by the maker: each score with the name the measurer gives the model and the setting it ran, its day and its licence.

Arena

Text Arena, gemini-2.5-flash: 1,409 (1,407–1,412, 125,521 votes), published 15 October 2026
Vision Arena, gemini-2.5-flash: 1,215 (1,211–1,220, 60,112 votes), published 9 October 2026

Arena’s leaderboard dataset (lmarena-ai/leaderboard-dataset on Hugging Face), CC BY 4.0: ratings from people’s votes between two anonymous models, as Arena publishes them. Data · CC BY 4.0

Epoch AI

Epoch Capabilities Index, Gemini 2.5 Flash (Sep 2025): 143.0 (139.5–146.6), as of 19 October 2026
Epoch Capabilities Index, Gemini 2.5 Flash (May 2025): 141.5 (139.2–142.9), as of 19 October 2026
Epoch Capabilities Index, Gemini 2.5 Flash (Jun 2025): 140.8 (138.6–142.3), as of 19 October 2026
Epoch Capabilities Index, Gemini 2.5 Flash (Apr 2025): 139.9 (135.9–141.9), as of 19 October 2026
OTIS Mock AIME 2024–2025, gemini-2.5-flash-preview-04-17: 73.1% (± 5.5), run 22 April 2025
OTIS Mock AIME 2024–2025, gemini-2.5-flash-preview-05-20: 70.8% (± 5.7), run 20 May 2025

Epoch AI, ‘Capabilities & benchmarking’, epoch.ai/benchmarks, CC BY 4.0: Epoch AI’s own runs and its Capabilities Index. Data · CC BY 4.0

Questions

When was Gemini 2.5 Flash released?

Google released Gemini 2.5 Flash on 17 April 2025.

What is the context window of Gemini 2.5 Flash?

The context window of Gemini 2.5 Flash is 1,048,576 tokens, as Google prints it.

How much does the Gemini 2.5 Flash API cost?

On the standard tier, Gemini 2.5 Flash costs $0.30 per 1M tokens for input and $2.50 per 1M tokens for output, as Google lists it.

What does Gemini 2.5 Flash take and return?

Gemini 2.5 Flash takes text, image, audio, video and returns text.

What is the knowledge cutoff of Gemini 2.5 Flash?

The knowledge cutoff of Gemini 2.5 Flash is January 2025.

Sources

Gemini 2.5 Flash | Gemini API | Google AI for Developers (read 16 October 2026)
Gemini 2.5 Flash is now in preview (read 16 October 2026)
Gemini Developer API pricing | Gemini API | Google AI for Developers (read 16 October 2026)
Gemini 2.5 Flash & 2.5 Flash Image Model Card (read 16 October 2026)

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