HEAD-TO-HEAD · BUDGET-TIER · VERIFIED 15 JUL 2026
GPT-4o mini vs Gemini 2.5 Flash: which is actually cheaper?
Both are budget-tier models from different providers, which makes this one of the more genuinely useful head-to-head comparisons on this site — same rough capability class, real price and context differences worth knowing before you pick.
| Spec | GPT-4o mini | Gemini 2.5 Flash |
|---|---|---|
| Provider | OpenAI | |
| Input / 1M tokens | $0.15 | $0.15 |
| Output / 1M tokens | $0.60 | $0.60 |
| Context window | 128K | 1M |
The output price gap
Gemini 2.5 Flash is 1.0x cheaper than GPT-4o mini on output tokens specifically — the number that matters most for any workload that generates more than it reads, like drafting or content generation. For input-heavy workloads the gap is different; check the table above directly for your specific ratio.
Context window
Gemini 2.5 Flash offers the larger context window of the two at 1M tokens. If your task needs to hold a large document, codebase, or long conversation history in a single call, that ceiling can matter more than the per-token price difference.
Worked example
At 150M input and 40M output tokens a month — a realistic budget-tier workload — GPT-4o mini runs about $46.50/month and Gemini 2.5 Flash runs about $46.50/month on standard list pricing.
Prices verified against each provider's official documentation, 15 July 2026. Use the calculator with your own usage for an exact comparison, or see the full price table for every tracked model.