Gemini 2.5 Flash is Google’s fastest large-context model, built for high-throughput applications that process up to one million tokens. Reach for it when you need rapid multimodal ingestion, tool calling, or reasoning at a balanced cost.
Modalities
Text+Image → Text
Input
$0.2025 /1M
Output
$0.81 /1M
Cached input
$0.02025 /1M90% off
Context
1M
Speed
fast
Performance
Live production data from real requests on Kyma — not synthetic benchmarks.
Rank
#7
of 87 active models
Tokens served
90.8M
all-time
Success rate
100%
last 7 days
Top apps using this model
Public apps sending the most traffic to this model — a signal of what real workloads it fits.
Pricing
Pay per token. Cached input is billed at 10% of the input rate.
+ Estimate your workload− Estimate your workload
Estimated monthly cost
$21.02
$0.7006 / day on Gemini 2.5 Flash
Same workload on:
Estimates use list pricing with cached input billed at the 90%-discount rate. Actual bills depend on real token counts — every response includes its exact cost.
When to use Gemini 2.5 Flash
Where this model earns its cost — and where it doesn't.
The model accepts text, image, audio, and video inputs, returning text outputs. It supports structured outputs, tool use, and reasoning, making it suitable for agentic workflows and standard chat applications.
On Kyma, requests route through automatic failover paths and return exact billing in usage.cost. You can target it directly or use the fast and long-context aliases. Prompt caching applies a 90% discount to repeated prefixes, and the API remains fully OpenAI-compatible at https://kymaapi.com/v1.
Output generation caps at 8,192 tokens per request. In live traffic, it maintains a median throughput of 140 tokens per second and a 97.9% success rate across 90 million served tokens.
Multimodal Document Analysis
Ingests text, images, audio, and video to extract structured data or answer questions.
High-Throughput Chat Agents
Handles rapid conversational turns with tool calling and reasoning at low latency.
Long-Context Summarization
Processes up to one million input tokens to condense lengthy transcripts or logs.
Real-Time Media Processing
Accepts audio and video inputs for fast transcription and content tagging.
Not ideal for: Do not use this model for tasks requiring outputs longer than 8,192 tokens, such as generating full-length books or extensive codebases in a single pass.
How it compares
Against the peers people actually weigh it against.
| Spec | Gemini 2.5 Flash | Gemini 3.5 Flash Lite | Gemini 3.6 Flash |
|---|---|---|---|
| Input /1M | $0.2025 | $0.405 | $2.025 |
| Output /1M | $0.81 | $3.375 | $10.125 |
| Context | 1M | 1M | 1M |
| Tools | Yes | Yes | Yes |
| Reasoning | Yes | Yes | Yes |
| Speed | fast | fast | fast |
Quick start
Up and running in under two minutes.
- 1
Create an API key
Sign up and grab a key from the dashboard — $0.50 free credit, no card required.
Get API key → - 2
Make your first request
Drop in your key and send a chat completion — fully OpenAI-compatible.
curl https://kymaapi.com/v1/chat/completions \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "gemini-2.5-flash", "messages": [ {"role": "user", "content": "Explain prompt caching in one paragraph."} ] }' - 3
Stream responses
Add
"stream": trueto receive tokens as they arrive.curl https://kymaapi.com/v1/chat/completions \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "gemini-2.5-flash", "stream": true, "messages": [{"role": "user", "content": "Hello!"}] }'
FAQ
Common questions about this model.
What is the context window of Gemini 2.5 Flash?
How much does the Gemini 2.5 Flash API cost?
Does Gemini 2.5 Flash support function calling?
How do I use Gemini 2.5 Flash?
Does Kyma support prompt caching for this model?
How can I verify which model served my request?
Do the fast and long-context aliases work here?
More models by Google
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|---|---|---|---|
| 1M | $2.025 | $10.125 | |
| 1M | $0.405 | $3.375 | |
| — | $0.0635 / min | ||
| 1M | $2.025 | $12.15 | |
| 128K | $0.0702 | $0.2006 | |
| — | $0.0389 / min | ||
| — | $0.046 / image | ||
| — | $0.0026 / min | ||