Gemini 2.5 Pro Preview 06-05 vs GPT-5 Chat vs o4-mini-deep-research
Gemini 2.5 Pro Preview 06-05 comes out ahead, 48 to 37 and 31 on our weighted score, though o4-mini-deep-research is 6% cheaper per token.
- Our pick
GoogleGemini 2.5 Pro Preview 06-05
48/100- ECI—
- Price$1.22 / $9.75
- Context1.05M
OpenAIGPT-5 Chat
31/100- ECI—
- Price$1.25 / $10.00
- Context400K
- OpenAI
o4-mini-deep-research
37/100- ECI—
- Price$1.80 / $7.20
- Context200K
Gemini 2.5 Pro Preview 06-05 is our pick
Gemini 2.5 Pro Preview 06-05 is the better all-round choice, scoring 48/100 against o4-mini-deep-research (37) and GPT-5 Chat (31). It leads on inputs & features and context window. 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 priceo4-mini-deep-researcho4-mini-deep-research $3.15 · Gemini 2.5 Pro Preview 06-05 $3.35 · GPT-5 Chat $3.44 per 1M tokens (3:1 blend)
- Longest contextGemini 2.5 Pro Preview 06-05Gemini 2.5 Pro Preview 06-05 1,048,576 · GPT-5 Chat 400,000 · o4-mini-deep-research 200,000 tokens
- Widest inputsGemini 2.5 Pro Preview 06-05Gemini 2.5 Pro Preview 06-05: Text, Images, PDFs, Audio · GPT-5 Chat: Text, Images · o4-mini-deep-research: Text, Images
- Self-hostingNo open weightsAll three are available only through APIs
| Measure | Weight | Gemini 2.5 Pro Preview 06-05 | GPT-5 Chat | o4-mini-deep-research |
|---|---|---|---|---|
| Price | 50% | 24 | 23 | 25 |
| Inputs & features | 30% | 80 | 35 | 60 |
| Context window | 20% | 61 | 44 | 32 |
| Overall | 100% | 48/100 | 31/100 | 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 Pro Preview 06-05Google | GPT-5 ChatOpenAI | o4-mini-deep-researchOpenAI |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $1.22 (best) | $1.25 | $1.80 |
| Output | $9.75 | $10.00 | $7.20 (best) |
| Cached input | — | — | — |
| Blended (3:1) | $3.35 | $3.44 | $3.15 (best) |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Median of 4 providers | Median of 5 providers | Median of 1 providers |
| Limits | |||
| Context window | 1,048,576 tokens (best) | 400,000 tokens | 200,000 tokens |
| Max output | 65,536 tokens | 128,000 tokens (best) | 100,000 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | Yes | No | No |
| Audio | Yes | No | No |
| Video | No | No | No |
| Reasoning | Yes | Yes | Yes |
| Tool calling | Yes | No | Yes |
| Structured output | No | No | No |
| Availability | |||
| Weights | Proprietary | Proprietary | Proprietary |
| API model ID | — | — | — |
| API providers | 4 | 5 (best) | 1 |
| Released | Jun 5, 2025 | Aug 7, 2025 | Jun 26, 2025 |
| Knowledge cutoff | Jan 31, 2025 | Sep 30, 2024 | 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 Pro Preview 06-05$31.69
- GPT-5 Chat$32.50
- o4-mini-deep-research$32.40
Which should you choose?
Which is better: Gemini 2.5 Pro Preview 06-05, GPT-5 Chat or o4-mini-deep-research?
Gemini 2.5 Pro Preview 06-05 is the better all-round choice, scoring 48/100 against o4-mini-deep-research (37) and GPT-5 Chat (31). It leads on inputs & features and context window. 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 Pro Preview 06-05, GPT-5 Chat or o4-mini-deep-research?
o4-mini-deep-research is cheaper at $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); GPT-5 Chat costs $1.25 input / $10.00 output per million tokens (median across 5 API providers). At a typical mix of three input tokens to one output token, that is $3.15 per million tokens for o4-mini-deep-research versus $3.35 for Gemini 2.5 Pro Preview 06-05 (1.1× as much) and $3.44 for GPT-5 Chat (1.1× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Gemini 2.5 Pro Preview 06-05 has not been scored yet, GPT-5 Chat 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 Pro Preview 06-05, GPT-5 Chat and o4-mini-deep-research yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Note that GPT-5 Chat does not support tool calling, which most coding agents need.
Which has the bigger context window?
Gemini 2.5 Pro Preview 06-05 has the largest context window at 1,048,576 tokens, against 400,000 for GPT-5 Chat and 200,000 for o4-mini-deep-research. Maximum output per response: Gemini 2.5 Pro Preview 06-05 up to 65,536, GPT-5 Chat up to 128,000, o4-mini-deep-research up to 100,000 tokens.
Which can read images, PDFs, audio or video?
Gemini 2.5 Pro Preview 06-05 accepts text, images, PDFs and audio; GPT-5 Chat accepts text and images; o4-mini-deep-research accepts text and images. Gemini 2.5 Pro Preview 06-05 handles the widest range of inputs.
Are any of these open source?
No. Gemini 2.5 Pro Preview 06-05, GPT-5 Chat and o4-mini-deep-research are proprietary and only available through APIs and apps.
Which is newer?
GPT-5 Chat is the newest, released Aug 7, 2025. o4-mini-deep-research came out Jun 26, 2025; Gemini 2.5 Pro Preview 06-05 came out Jun 5, 2025. Knowledge cutoff: Gemini 2.5 Pro Preview 06-05 Jan 31, 2025, GPT-5 Chat Sep 30, 2024, 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.
