About Gemini 2.5 Flash
Gemini 2.5 Flash is Google's stated price-performance pick within the Gemini 2.5 family: a low-latency, high-volume model that still supports reasoning, rather than a stripped-down budget option. It keeps the family's full multimodal intake — text, images, audio, video — and the million-token-class context window, which is unusual generosity at its price tier.
Google has since shipped Flash models in newer generations, but this release stays available as a stable workhorse, and its combination of low rates and real reasoning keeps it a common default for production pipelines.
About GPT-5 mini
GPT-5 mini is the mid-size member of the GPT-5 family, offered by OpenAI for well-defined tasks that need solid reasoning without flagship cost — the role previously held by o4-mini, which OpenAI lists mini as succeeding. It handles text and image input with text output, and keeps the same reasoning-effort controls and tool integrations as its larger sibling.
The design intent is precision at a price: workloads with clear instructions and bounded scope — support automation, structured extraction, code review at scale — are its home ground, with the full family context window available when documents run long.
Frequently asked questions
Which is cheaper, Gemini 2.5 Flash or GPT-5 mini?
On a mixed workload (10K input / 2K output tokens per request), GPT-5 mini costs $0.0065 per request versus $0.0080 for Gemini 2.5 Flash — about 1.2× less. List rates: Gemini 2.5 Flash is $0.3/M input and $2.5/M output; GPT-5 mini is $0.25/M input and $2/M output.
What does a typical chat message cost on Gemini 2.5 Flash vs GPT-5 mini?
A short chat message (about 500 input and 250 output tokens) costs roughly $0.0008 with Gemini 2.5 Flash and $0.0006 with GPT-5 mini. At 1,000 messages a day that is about $23.25 versus $18.75 per month.
Do Gemini 2.5 Flash and GPT-5 mini have the same context window?
No. Gemini 2.5 Flash accepts up to 1024K tokens of input; GPT-5 mini accepts up to 391K. For workloads built around very large prompts, that difference can matter as much as the per-token rates.
Related
Compare all models at once ·Gemini 2.5 Flash pricing in detail ·GPT-5 mini pricing in detail ·Count tokens in your prompt
Last updated 2026-09-03. Prices verified against each provider's official pricing page; see the methodology.