# Gemini 2.5 Flash

Gemini 2.5 Flash is an AI model released by Google on Apr 17 2025. At release it scored 19% on BullshitBench v2.

## Facts

| Field | Value |
| --- | --- |
| Model | Gemini 2.5 Flash |
| Developer | Google |
| Release date | Thursday, Apr 17 2025 |
| Licensing | Proprietary |

## API pricing

All rates in USD per 1,000,000 tokens, pay-as-you-go.

| Tier | Input | Cached input | Output |
| --- | --- | --- | --- |
| Standard text/image/video | $0.30 | $0.03 | $2.50 |

Output prices include reasoning tokens.
Verified August 18, 2026 against the first-party source: https://ai.google.dev/gemini-api/docs/pricing

## Benchmark scores published at release

| Benchmark | Score | Source | What it measures |
| --- | --- | --- | --- |
| BullshitBench v2 | 19% | Lab | Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. |

## About Gemini 2.5 Flash

Gemini 2.5 Flash, released April 17, 2025, brought hybrid reasoning to Google's high-volume tier: developers could turn thinking on or off and set an exact token budget for it, trading accuracy against latency and cost per request. It was the first model to expose that dial explicitly, and the design was widely copied.

Positioned as the workhorse of the 2.5 generation, Flash delivered a large share of 2.5 Pro's capability at a fraction of the price, making it one of the most heavily used API models of 2025 for chat products, summarisation, and agent sub-tasks. Flash-Lite followed in June 2025 to cover the ultra-low-cost end of the lineup.

## Questions and answers

### When was Gemini 2.5 Flash released?

Gemini 2.5 Flash was released by Google on Thursday, Apr 17 2025.

### Who made Gemini 2.5 Flash?

Gemini 2.5 Flash was built by Google. Builds the Gemini family of models through Google DeepMind. Integrates AI across Google products.

### How much does Gemini 2.5 Flash cost?

Gemini 2.5 Flash costs $0.30 per million input tokens and $2.50 per million output tokens through the Google API. Cached input is $0.03 per million tokens. Output prices include reasoning tokens. Rates are pay-as-you-go API prices verified against Google's published pricing on August 18, 2026.

### What benchmark scores did Gemini 2.5 Flash get?

Gemini 2.5 Flash reports 1 tracked benchmark score — BullshitBench v2: 19%. Scores are the figures published at release by Google.

### Is Gemini 2.5 Flash open source?

No. Gemini 2.5 Flash is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

### What came before and after Gemini 2.5 Flash?

Google's previous tracked release was Gemini 2.5 Pro on Mar 25 2025, 23 days earlier. It was followed by Gemini 2.5 Flash-Lite on Jun 17 2025.


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Canonical page: https://aireleasetracker.com/model/google/gemini-2.5-flash
Full dataset: https://aireleasetracker.com/llms-full.txt · JSON: https://aireleasetracker.com/models.json
Source: AI Release Tracker (https://aireleasetracker.com). Benchmark scores are the figures published by the releasing lab at launch.