Gemini 2.5 Flash-Lite vs OpenAI o3
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Gemini 2.5 Flash-Lite
Google · Jul 2025
Ten cents per million input tokens with multimodal support — the price floor of the 2025 Gemini lineup.
OpenAI o3
68.9OpenAI · Apr 2025
OpenAI's dedicated 2025 reasoning model that pioneered thinking-with-images and agentic tool use within chain-of-thought.
The verdict
These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Gemini 2.5 Flash-Lite works out roughly 20x cheaper per blended million tokens. Gemini 2.5 Flash-Lite also takes 1.0M of context versus 200K for OpenAI o3.
Specs & pricing
| Gemini 2.5 Flash-Lite | OpenAI o3 | |
|---|---|---|
| modhub Index | — | 68.9 |
| Input price / 1M | $0.1 | $2 |
| Output price / 1M | $0.4 | $8 |
| Context window | 1.0M | 200K |
| Max output | 66K | 100K |
| Open weights | no | no |
| Reasoning model | no | yes |
| Multimodal input | text, image, audio, video | text, image |
| Knowledge cutoff | Jan 2025 | May 2024 |
| Released | Jul 2025 | Apr 2025 |
| Example monthly cost* | $1.60 | $32.00 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Gemini 2.5 Flash-Lite or OpenAI o3?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Gemini 2.5 Flash-Lite works out roughly 20x cheaper per blended million tokens. Gemini 2.5 Flash-Lite also takes 1.0M of context versus 200K for OpenAI o3.
- Which is cheaper, Gemini 2.5 Flash-Lite or OpenAI o3?
- Gemini 2.5 Flash-Lite costs $0.1/$0.4 per million input/output tokens, while OpenAI o3 costs $2/$8. For a typical workload of 10M input and 1.5M output tokens per month, that's $1.60 versus $32.00.
- Which model is better for coding, Gemini 2.5 Flash-Lite or OpenAI o3?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.
More comparisons
Gemini 2.5 Flash-Lite vs GPT-5.5OpenAI o3 vs GPT-5.5Gemini 2.5 Flash-Lite vs GPT-5.2OpenAI o3 vs GPT-5.2Gemini 2.5 Flash-Lite vs GPT-5.1OpenAI o3 vs GPT-5.1Gemini 2.5 Flash-Lite vs GPT-5OpenAI o3 vs GPT-5Gemini 2.5 Flash-Lite vs GPT-5 miniOpenAI o3 vs GPT-5 miniGemini 2.5 Flash-Lite vs Claude Fable 5OpenAI o3 vs Claude Fable 5