GPT-5-Codex vs Mistral Large 3 vs Gemini 2.5 Computer Use Preview
Mistral Large 3 comes out ahead, 50 to 42 and 35 on our weighted score, and it is the cheaper option too.
OpenAIGPT-5-Codex
42/100- ECI—
- Price$1.25 / $10.00
- Context400K
- Our pick
Mistral AIMistral Large 3
50/100- ECI—
- Price$0.50 / $1.50
- Context262K
GoogleGemini 2.5 Computer Use Preview
35/100- ECI—
- Price$1.25 / $10.00
- Context128K
Mistral Large 3 is our pick
Mistral Large 3 is the better all-round choice, scoring 50/100 against GPT-5-Codex (42) and Gemini 2.5 Computer Use Preview (35). It leads on price. GPT-5-Codex wins 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 priceMistral Large 3Mistral Large 3 $0.75 · GPT-5-Codex $3.44 · Gemini 2.5 Computer Use Preview $3.44 per 1M tokens (3:1 blend)
- Longest contextGPT-5-CodexGPT-5-Codex 400,000 · Mistral Large 3 262,144 · Gemini 2.5 Computer Use Preview 128,000 tokens
- Widest inputsSame inputsGPT-5-Codex: Text, Images · Mistral Large 3: Text, Images · Gemini 2.5 Computer Use Preview: Text, Images
- Self-hostingMistral Large 3Publishes downloadable weights
| Measure | Weight | GPT-5-Codex | Mistral Large 3 | Gemini 2.5 Computer Use Preview |
|---|---|---|---|---|
| Price | 50% | 24 | 56 | 24 |
| Inputs & features | 30% | 70 | 50 | 60 |
| Context window | 20% | 44 | 37 | 24 |
| Overall | 100% | 42/100 | 50/100 | 35/100 |
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 | GPT-5-CodexOpenAI | Mistral Large 3Mistral AI | Gemini 2.5 Computer Use PreviewGoogle |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $1.25 | $0.50 (best) | $1.25 |
| Output | $10.00 | $1.50 (best) | $10.00 |
| Cached input | — | $0.05 | — |
| Blended (3:1) | $3.44 | $0.75 (best) | $3.44 |
| Long-context rate | Same rate | Same rate | Over 200K: $2.50 / $15.00 |
| Price source | Median of 3 providers | Official Mistral API | Official Google API |
| Limits | |||
| Context window | 400,000 tokens (best) | 262,144 tokens | 128,000 tokens |
| Max output | 128,000 tokens | 262,144 tokens (best) | 64,000 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | Yes | No | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | No | No |
| Availability | |||
| Weights | Proprietary | Open | Proprietary |
| API model ID | — | mistral-large-2512 | gemini-2.5-computer-use-preview-10-2025 |
| API providers | 3 | 13 (best) | 2 |
| Released | Sep 15, 2025 | Dec 2, 2025 | Oct 7, 2025 |
| Knowledge cutoff | Sep 30, 2024 | Nov 2024 | Jan 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- GPT-5-Codex$32.50
- Mistral Large 3$8.00
- Gemini 2.5 Computer Use Preview$32.50
Which should you choose?
Which is better: GPT-5-Codex, Mistral Large 3 or Gemini 2.5 Computer Use Preview?
Mistral Large 3 is the better all-round choice, scoring 50/100 against GPT-5-Codex (42) and Gemini 2.5 Computer Use Preview (35). It leads on price. GPT-5-Codex wins 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, GPT-5-Codex, Mistral Large 3 or Gemini 2.5 Computer Use Preview?
Mistral Large 3 is cheaper at $0.50 input / $1.50 output per million tokens (official Mistral API price). GPT-5-Codex costs $1.25 input / $10.00 output per million tokens (median across 3 API providers); Gemini 2.5 Computer Use Preview costs $1.25 input / $10.00 output per million tokens (official Google API price). At a typical mix of three input tokens to one output token, that is $0.75 per million tokens for Mistral Large 3 versus $3.44 for GPT-5-Codex (4.6× as much) and $3.44 for Gemini 2.5 Computer Use Preview (4.6× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. GPT-5-Codex has not been scored yet, Mistral Large 3 has not been scored yet and Gemini 2.5 Computer Use Preview has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for GPT-5-Codex, Mistral Large 3 and Gemini 2.5 Computer Use Preview 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?
GPT-5-Codex has the largest context window at 400,000 tokens, against 262,144 for Mistral Large 3 and 128,000 for Gemini 2.5 Computer Use Preview. Maximum output per response: GPT-5-Codex up to 128,000, Mistral Large 3 up to 262,144, Gemini 2.5 Computer Use Preview up to 64,000 tokens.
Which can read images, PDFs, audio or video?
GPT-5-Codex accepts text and images; Mistral Large 3 accepts text and images; Gemini 2.5 Computer Use Preview accepts text and images. They handle the same number of input types.
Are any of these open source?
Mistral Large 3 publishes its weights and can be self-hosted; GPT-5-Codex and Gemini 2.5 Computer Use Preview is proprietary.
Which is newer?
Mistral Large 3 is the newest, released Dec 2, 2025. Gemini 2.5 Computer Use Preview came out Oct 7, 2025; GPT-5-Codex came out Sep 15, 2025. Knowledge cutoff: GPT-5-Codex Sep 30, 2024, Mistral Large 3 Nov 2024, Gemini 2.5 Computer Use Preview Jan 2025.
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 Oct 4, 2026.
