Gemini 2.5 Flash-Lite vs Gemini 2.5 Pro Preview 06-05 vs o4-mini-deep-research
Gemini 2.5 Flash-Lite comes out ahead, 83 to 48 and 37 on our weighted score, and it is the cheaper option too.
- Our pick
GoogleGemini 2.5 Flash-Lite
83/100- ECI—
- Price$0.10 / $0.40
- Context1.05M
- Google
Gemini 2.5 Pro Preview 06-05
48/100- ECI—
- Price$1.22 / $9.75
- Context1.05M
OpenAIo4-mini-deep-research
37/100- ECI—
- Price$1.80 / $7.20
- Context200K
Gemini 2.5 Flash-Lite is our pick
Gemini 2.5 Flash-Lite is the better all-round choice, scoring 83/100 against Gemini 2.5 Pro Preview 06-05 (48) and o4-mini-deep-research (37). It leads on price and inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceGemini 2.5 Flash-LiteGemini 2.5 Flash-Lite $0.175 · o4-mini-deep-research $3.15 · Gemini 2.5 Pro Preview 06-05 $3.35 per 1M tokens (3:1 blend)
- Longest contextGemini 2.5 Flash-Lite and Gemini 2.5 Pro Preview 06-05Gemini 2.5 Flash-Lite 1,048,576 · Gemini 2.5 Pro Preview 06-05 1,048,576 · o4-mini-deep-research 200,000 tokens
- Widest inputsGemini 2.5 Flash-LiteGemini 2.5 Flash-Lite: Text, Images, PDFs, Audio, Video · Gemini 2.5 Pro Preview 06-05: Text, Images, PDFs, Audio · o4-mini-deep-research: Text, Images
- Self-hostingNo open weightsAll three are available only through APIs
| Measure | Weight | Gemini 2.5 Flash-Lite | Gemini 2.5 Pro Preview 06-05 | o4-mini-deep-research |
|---|---|---|---|---|
| Price | 50% | 82 | 24 | 25 |
| Inputs & features | 30% | 100 | 80 | 60 |
| Context window | 20% | 61 | 61 | 32 |
| Overall | 100% | 83/100 | 48/100 | 37/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Gemini 2.5 Flash-LiteGoogle | Gemini 2.5 Pro Preview 06-05Google | o4-mini-deep-researchOpenAI |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $0.10 (best) | $1.22 | $1.80 |
| Output | $0.40 (best) | $9.75 | $7.20 |
| Cached input | $0.01 | — | — |
| Blended (3:1) | $0.175 (best) | $3.35 | $3.15 |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Google API | Median of 4 providers | Median of 1 providers |
| Limits | |||
| Context window | 1,048,576 tokens (best) | 1,048,576 tokens (best) | 200,000 tokens |
| Max output | 65,536 tokens | 65,536 tokens | 100,000 tokens (best) |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | Yes | Yes | No |
| Audio | Yes | Yes | No |
| Video | Yes | No | No |
| Reasoning | Yes | Yes | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | No | No |
| Availability | |||
| Weights | Proprietary | Proprietary | Proprietary |
| API model ID | gemini-2.5-flash-lite | — | — |
| API providers | 24 (best) | 4 | 1 |
| Released | Jun 17, 2025 | Jun 5, 2025 | Jun 26, 2025 |
| Knowledge cutoff | Jan 2025 | Jan 31, 2025 | May 2024 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Gemini 2.5 Flash-Lite$1.80
- Gemini 2.5 Pro Preview 06-05$31.69
- o4-mini-deep-research$32.40
Which should you choose?
Which is better: Gemini 2.5 Flash-Lite, Gemini 2.5 Pro Preview 06-05 or o4-mini-deep-research?
Gemini 2.5 Flash-Lite is the better all-round choice, scoring 83/100 against Gemini 2.5 Pro Preview 06-05 (48) and o4-mini-deep-research (37). It leads on price and inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Gemini 2.5 Flash-Lite, Gemini 2.5 Pro Preview 06-05 or o4-mini-deep-research?
Gemini 2.5 Flash-Lite is cheaper at $0.10 input / $0.40 output per million tokens (official Google API price). o4-mini-deep-research costs $1.80 input / $7.20 output per million tokens (median across 1 API provider); Gemini 2.5 Pro Preview 06-05 costs $1.22 input / $9.75 output per million tokens (median across 4 API providers). At a typical mix of three input tokens to one output token, that is $0.175 per million tokens for Gemini 2.5 Flash-Lite versus $3.15 for o4-mini-deep-research (18× as much) and $3.35 for Gemini 2.5 Pro Preview 06-05 (19× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Gemini 2.5 Flash-Lite has not been scored yet, Gemini 2.5 Pro Preview 06-05 has not been scored yet and o4-mini-deep-research has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Gemini 2.5 Flash-Lite, Gemini 2.5 Pro Preview 06-05 and o4-mini-deep-research yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.
Which has the bigger context window?
Gemini 2.5 Flash-Lite and Gemini 2.5 Pro Preview 06-05 have the largest context windows (1,048,576 and 1,048,576 tokens), against 200,000 for o4-mini-deep-research. Maximum output per response: Gemini 2.5 Flash-Lite up to 65,536, Gemini 2.5 Pro Preview 06-05 up to 65,536, o4-mini-deep-research up to 100,000 tokens.
Which can read images, PDFs, audio or video?
Gemini 2.5 Flash-Lite accepts text, images, PDFs, audio and video; Gemini 2.5 Pro Preview 06-05 accepts text, images, PDFs and audio; o4-mini-deep-research accepts text and images. Gemini 2.5 Flash-Lite handles the widest range of inputs.
Are any of these open source?
No. Gemini 2.5 Flash-Lite, Gemini 2.5 Pro Preview 06-05 and o4-mini-deep-research are proprietary and only available through APIs and apps.
Which is newer?
o4-mini-deep-research is the newest, released Jun 26, 2025. Gemini 2.5 Flash-Lite came out Jun 17, 2025; Gemini 2.5 Pro Preview 06-05 came out Jun 5, 2025. Knowledge cutoff: Gemini 2.5 Flash-Lite Jan 2025, Gemini 2.5 Pro Preview 06-05 Jan 31, 2025, o4-mini-deep-research May 2024.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
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