GoogleGemini 2.5Sep 25, 2025
Google: Gemini 2.5 Flash Lite Preview 09-2025
Gemini 2.5 Flash-Lite is a lightweight reasoning model in the Gemini 2.5 family, optimized for ultra-low latency and cost efficiency. It offers improved throughput, faster token generation, and better performance across common benchmarks compared to earlier Flash models. By default, "thinking" (i.e. multi-pass reasoning) is disabled to prioritize speed, but developers can enable it via the Reasoning API parameter to selectively trade off cost for intelligence.
Context Window
1.0M
tokens
Max Output
66K
tokens
Released
Sep 25, 2025
Arena Rank
—
Output Speed
312
tokens/sec
Time to First Token
450ms
TTFT
Capabilities
👁Vision
🧠Reasoning
🔧Tool Calling
⚡Prompt Caching
🖥Computer Use
🎨Image Generation
Supported Parameters
Include Reasoning
Show reasoning tokens
Max Tokens
Output length limit
Reasoning
Extended thinking
Response Format
JSON mode / structured output
Seed
Deterministic outputs
Stop Sequences
Custom stop tokens
structured_outputs
Temperature
Controls randomness
Tool Choice
Control tool usage
Tool Calling
Function calling support
Top P
Nucleus sampling
Pricing Comparison
| Router | Input / 1M | Output / 1M | Cached Input / 1M |
|---|---|---|---|
| OpenRouter | $0.10 | $0.40 | $0.01 |
| Vercel AI | $0.10 | $0.40 | — |
| Martian | $0.10 | $0.40 | — |
Benchmarks
Artificial Analysis
Intelligence IndexArtificial Analysis
65/100Coding IndexArtificial Analysis
58/100Math IndexArtificial Analysis
82/100MMLU-PROArtificial Analysis
0.775/1GPQA DiamondArtificial Analysis
0.658/1MATH-500Artificial Analysis
0.928/1AIME 2024Artificial Analysis
0.62/1Humanity's Last ExamArtificial Analysis
0.065/1LiveCodeBenchArtificial Analysis
0.598/1SciCodeArtificial Analysis
0.315/1Model IDs
OpenRouter
google/gemini-2.5-flash-lite-preview-09-2025Tags
visionreasoningtool-calling
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