Pixtral 12B vs o3-pro vs Llama-3.2-3B
Pixtral 12B comes out ahead, 64 to 49 and 27 on our weighted score, and it is the cheaper option too.
- Our pick
Mistral AIPixtral 12B
64/100- ECI—
- Price$0.15 / $0.15
- Context128K
OpenAIo3-pro
27/100- ECI147.4
- Price$20.00 / $80.00
- Context200K
MetaLlama-3.2-3B
49/100- ECI—
- Price$0.10 / $0.335
- Context131K
Pixtral 12B is our pick
Pixtral 12B is the better all-round choice, scoring 64/100 against Llama-3.2-3B (49) and o3-pro (27). o3-pro 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 pricePixtral 12BPixtral 12B $0.15 · Llama-3.2-3B $0.159 · o3-pro $35.00 per 1M tokens (3:1 blend)
- Longest contexto3-proo3-pro 200,000 · Llama-3.2-3B 131,072 · Pixtral 12B 128,000 tokens
- Widest inputsPixtral 12B and o3-proPixtral 12B: Text, Images · o3-pro: Text, Images · Llama-3.2-3B: Text
- Self-hostingPixtral 12B and Llama-3.2-3BPublishes downloadable weights (Llama 3.2 Community License)
| Measure | Weight | Pixtral 12B | o3-pro | Llama-3.2-3B |
|---|---|---|---|---|
| Price | 50% | 89 | 0 | 88 |
| Inputs & features | 30% | 50 | 70 | 0 |
| Context window | 20% | 24 | 32 | 24 |
| Overall | 100% | 64/100 | 27/100 | 49/100 |
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 | Pixtral 12BMistral AI | o3-proOpenAI | Llama-3.2-3BMeta |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | 147.4 | — |
| ECI rank | — | #60 of 148 | — |
| Price per million tokens | |||
| Input | $0.15 | $20.00 | $0.10 (best) |
| Output | $0.15 (best) | $80.00 | $0.335 |
| Cached input | — | — | — |
| Blended (3:1) | $0.15 (best) | $35.00 | $0.159 |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Mistral API | Official OpenAI API | Median of 3 providers |
| Limits | |||
| Context window | 128,000 tokens | 200,000 tokens (best) | 131,072 tokens |
| Max output | 128,000 tokens (best) | 100,000 tokens | 8,192 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | No |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | No | Yeslow · medium · high | No |
| Tool calling | Yes | Yes | No |
| Structured output | No | Yes | No |
| Availability | |||
| Weights | Open | Proprietary | OpenLlama 3.2 Community License |
| API model ID | pixtral-12b | o3-pro | — |
| API providers | 4 | 6 (best) | 3 |
| Released | Sep 1, 2024 | Jun 10, 2025 | Sep 25, 2024 |
| Knowledge cutoff | Sep 2024 | May 2024 | Dec 2023 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Pixtral 12B$1.80
- o3-pro$360.00
- Llama-3.2-3B$1.67
Which should you choose?
Which is better: Pixtral 12B, o3-pro or Llama-3.2-3B?
Pixtral 12B is the better all-round choice, scoring 64/100 against Llama-3.2-3B (49) and o3-pro (27). o3-pro 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, Pixtral 12B, o3-pro or Llama-3.2-3B?
Pixtral 12B is cheaper at $0.15 input / $0.15 output per million tokens (official Mistral API price). Llama-3.2-3B costs $0.10 input / $0.335 output per million tokens (median across 3 API providers); o3-pro costs $20.00 input / $80.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $0.15 per million tokens for Pixtral 12B versus $0.159 for Llama-3.2-3B (1.1× as much) and $35.00 for o3-pro (233× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Pixtral 12B has not been scored yet, o3-pro has an ECI of 147.4 and Llama-3.2-3B has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Pixtral 12B, o3-pro and Llama-3.2-3B yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Note that Llama-3.2-3B does not support tool calling, which most coding agents need.
Which has the bigger context window?
o3-pro has the largest context window at 200,000 tokens, against 131,072 for Llama-3.2-3B and 128,000 for Pixtral 12B. Maximum output per response: Pixtral 12B up to 128,000, o3-pro up to 100,000, Llama-3.2-3B up to 8,192 tokens.
Which can read images, PDFs, audio or video?
Pixtral 12B accepts text and images; o3-pro accepts text and images; Llama-3.2-3B accepts text. Pixtral 12B handles the widest range of inputs.
Are any of these open source?
Pixtral 12B and Llama-3.2-3B publishes its weights (Llama 3.2 Community License) and can be self-hosted; o3-pro is proprietary.
Which is newer?
o3-pro is the newest, released Jun 10, 2025. Llama-3.2-3B came out Sep 25, 2024; Pixtral 12B came out Sep 1, 2024. Knowledge cutoff: Pixtral 12B Sep 2024, o3-pro May 2024, Llama-3.2-3B Dec 2023.
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.
