Gemini 2.5 Flash is Google's state-of-the-art workhorse model, specifically designed for advanced reasoning, coding, mathematics, and scientific tasks. It includes built-in "thinking" capabilities, enabling it to provide responses with grea…
Model details →Google: Gemini 2.5 Flash vs OpenAI: o3
Google: Gemini 2.5 Flash wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instruction-following. Use it to think through multi-step problems…
Model details →Side-by-side comparison
| Capability | Google: Gemini 2.5 Flash | OpenAI: o3 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 200K | 🏆 Google: Gemini 2.5 Flash |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.30 | $2.00 | 🏆 Google: Gemini 2.5 Flash |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $2.50 | $8.00 | 🏆 Google: Gemini 2.5 Flash |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Google: Gemini 2.5 Flash better than OpenAI: o3?
Google: Gemini 2.5 Flash wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Google: Gemini 2.5 Flash and OpenAI: o3?
Input: $0.30 vs $2.00 per 1M tokens. Output: $2.50 vs $8.00 per 1M tokens.
What context windows do Google: Gemini 2.5 Flash and OpenAI: o3 support?
Google: Gemini 2.5 Flash supports up to 1.0M tokens. OpenAI: o3 supports up to 200K tokens.
Do both Google: Gemini 2.5 Flash and OpenAI: o3 support tool calling?
Google: Gemini 2.5 Flash: yes. OpenAI: o3: yes.