Gemini 3.1 Flash-Lite vs o4-mini
Gemini 3.1 Flash-Lite and o4-mini are both current production-tier models. Gemini 3.1 Flash-Lite is meaningfully cheaper at $0.25 / $1.5 per 1M. Gemini 3.1 Flash-Lite has a 1M context window — about 5× the 200k of o4-mini. Gemini 3.1 Flash-Lite leads on long-context retrieval. o4-mini leads on coding, reasoning, general knowledge.
Specs side by side
| Metric | Google Gemini 3.1 Flash-Lite | OpenAI o4-mini |
|---|---|---|
| Input price (per 1M) | $0.25 | $1.1 |
| Output price (per 1M) | $1.5 | $4.4 |
| Context window | 1M tokens | 200k tokens |
| Speed tier | ultra | slow |
| Open weights | No | No |
| EU region | Yes | Yes |
| Free tier | Google AI Studio | No |
| Prompt caching | No | Yes |
| Vision input | Yes | Yes |
| Extended thinking | No | Yes |
When to choose each
Choose Gemini 3.1 Flash-Lite if…
- Cost is a priority ($0.25 / $1.5 per 1M vs $1.1 / $4.4 per 1M)
- You need 1M context (5× more than o4-mini)
- Low latency matters (ultra vs slow)
- You want a free tier for prototyping
- Long-context retrieval is central to your workload
Choose o4-mini if…
- HIPAA eligibility is required
- Coding is central to your workload
- Reasoning is central to your workload
Benchmark delta
Gemini 3.1 Flash-Lite leads on
- Long-context retrieval
o4-mini leads on
- Coding
- Reasoning
- General knowledge
- Instruction following
- Vision
- Tool use
FAQ — Gemini 3.1 Flash-Lite vs o4-mini
Gemini 3.1 Flash-Lite vs o4-mini — which is better?
Gemini 3.1 Flash-Lite and o4-mini are both current production-tier models. Gemini 3.1 Flash-Lite is meaningfully cheaper at $0.25 / $1.5 per 1M. Gemini 3.1 Flash-Lite has a 1M context window — about 5× the 200k of o4-mini. Gemini 3.1 Flash-Lite leads on long-context retrieval. o4-mini leads on coding, reasoning, general knowledge. The right pick depends on your use case — see "When to choose each" above for a data-driven decision.
How does Gemini 3.1 Flash-Lite pricing compare to o4-mini?
Gemini 3.1 Flash-Lite costs $0.25 / $1.5 per 1M vs o4-mini at $1.1 / $4.4 per 1M. Gemini 3.1 Flash-Lite is cheaper on output tokens by roughly 193%. Both support prompt caching, which reduces effective cost by 80-90% on repeat system prompts.
Does Gemini 3.1 Flash-Lite or o4-mini have the bigger context window?
Gemini 3.1 Flash-Lite has a 1M-token context window — 5× the 200k context of o4-mini. Enough for entire codebases, books, or multi-document RAG.
Is there a free tier for Gemini 3.1 Flash-Lite or o4-mini?
Gemini 3.1 Flash-Lite: yes — Reduced daily quota; most generous free tier of any frontier lab. o4-mini: no — Paid-only.
Which is better for coding — Gemini 3.1 Flash-Lite or o4-mini?
o4-mini leads on coding benchmarks (Gemini 3.1 Flash-Lite: 72/100, o4-mini: 92/100). For production coding agents also weigh tool-use performance — Gemini 3.1 Flash-Lite scores 76, o4-mini scores 88.