Llama-3.2-3B vs o3-pro
Llama-3.2-3B comes out ahead, 49 to 27 on our weighted score, and it is the cheaper option too.
- Our pick
MetaLlama-3.2-3B
49/100- ECI—
- Price$0.10 / $0.335
- Context131K
OpenAIo3-pro
27/100- ECI147.4
- Price$20.00 / $80.00
- Context200K
Add a model
Make it a three-way comparison.
Llama-3.2-3B is our pick
Llama-3.2-3B is the better all-round choice, scoring 49/100 against o3-pro (27). It leads on price. 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 priceLlama-3.2-3BLlama-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 tokens
- Widest inputso3-proLlama-3.2-3B: Text · o3-pro: Text, Images
- Self-hostingLlama-3.2-3BPublishes downloadable weights (Llama 3.2 Community License)
| Measure | Weight | Llama-3.2-3B | o3-pro |
|---|---|---|---|
| Price | 50% | 88 | 0 |
| Inputs & features | 30% | 0 | 70 |
| Context window | 20% | 24 | 32 |
| Overall | 100% | 49/100 | 27/100 |
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 | Llama-3.2-3BMeta | o3-proOpenAI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | 147.4 |
| ECI rank | — | #60 of 148 |
| Price per million tokens | ||
| Input | $0.10 (best) | $20.00 |
| Output | $0.335 (best) | $80.00 |
| Cached input | — | — |
| Blended (3:1) | $0.159 (best) | $35.00 |
| Long-context rate | Same rate | Same rate |
| Price source | Median of 3 providers | Official OpenAI API |
| Limits | ||
| Context window | 131,072 tokens | 200,000 tokens (best) |
| Max output | 8,192 tokens | 100,000 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | Yes |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | No | Yeslow · medium · high |
| Tool calling | No | Yes |
| Structured output | No | Yes |
| Availability | ||
| Weights | OpenLlama 3.2 Community License | Proprietary |
| API model ID | — | o3-pro |
| API providers | 3 | 6 (best) |
| Released | Sep 25, 2024 | Jun 10, 2025 |
| Knowledge cutoff | Dec 2023 | 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.
- Llama-3.2-3B$1.67
- o3-pro$360.00
Which should you choose?
Which is better: Llama-3.2-3B or o3-pro?
Llama-3.2-3B is the better all-round choice, scoring 49/100 against o3-pro (27). It leads on price. 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, Llama-3.2-3B or o3-pro?
Llama-3.2-3B is cheaper at $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 $0.159 per million tokens for Llama-3.2-3B versus $35.00 for o3-pro (220× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Llama-3.2-3B has not been scored yet and o3-pro has an ECI of 147.4.
Which is better for coding?
There are no published SWE-bench Verified results for Llama-3.2-3B and o3-pro 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. Maximum output per response: Llama-3.2-3B up to 8,192, o3-pro up to 100,000 tokens.
Which can read images, PDFs, audio or video?
Llama-3.2-3B accepts text; o3-pro accepts text and images. o3-pro handles the widest range of inputs.
Are any of these open source?
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. Knowledge cutoff: Llama-3.2-3B Dec 2023, o3-pro 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 Oct 4, 2026.
