Looking for an honest Meta Llama 3.1 405B vs OpenAI o1-pro comparison in 2026? We scored both ai language models on the same six-dimension framework — performance, battery, display, camera, design and value — using identical methodology, so the numbers below are directly comparable. Both products score nearly identically (62/100 vs 62/100) — this is a genuine toss-up that hinges on which specs matter most for your use case. The widest gap is in design and build, where the OpenAI o1-pro pulls noticeably ahead.
Meta
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Meta Llama 3.1 405B and OpenAI o1-pro are closely matched ai language models devices with nearly identical overall scores (62 vs 62). The best choice depends on which specific features matter most to you.
Scores are relative within the ai language modelscategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
✓ Pros
✗ Cons
✓ Pros
✗ Cons
Lower cost = better value. Free = open-source self-hosted.
| Metric | 3.1 405B | OpenAI o1-pro |
|---|---|---|
| Input (Prompt) | ✓Free/1M | $150.00/1M |
| Output (Completion) | ✓Free/1M | $600.00/1M |
| Open Source | ✓ Free | Proprietary |
Context Window (tokens)
| Metric | 3.1 405B | OpenAI o1-pro |
|---|---|---|
| Max Output | 4,096 tok | ✓100,000 tok |
| Speed | ✓30 tok/s | 25 tok/s |
| Time to First Token | ✓1.5s | 5.0s |
| Languages | 8+ | ✓50+ |
Higher is better. Industry-standard AI evaluation benchmarks.
3.1 405B
OpenAI o1-pro
3.1 405B
OpenAI o1-pro
3.1 405B
OpenAI o1-pro
3.1 405B
OpenAI o1-pro
3.1 405B
OpenAI o1-pro
| Feature | 3.1 405B | OpenAI o1-pro |
|---|---|---|
| Reasoning / Chain-of-Thought | ✕ | ✓ |
| Vision (Image Input) | ✕ | ✓ |
| Audio Input | ✕ | ✕ |
| Video Input | ✕ | ✕ |
| Image/Audio Output | ✕ | ✕ |
| Function Calling / Tools | ✓ | ✓ |
| JSON Mode | ✓ | ✓ |
| Real-time Web Access | ✕ | ✕ |
| Fine-tuning Support | ✓ | ✕ |
| Batch API | ✓ | ✕ |
| Streaming | ✓ | ✕ |
| Open Source | ✓ | ✕ |
| Field | 3.1 405B | OpenAI o1-pro |
|---|---|---|
| Provider | Meta | OpenAI |
| Parameters | 405B | — |
| Knowledge Cutoff | 2023-12 | 2025-01 |
| License | Llama 3.1 Community | Commercial |
| Best For | open sourceself hostingfine tuningenterprise privacy | frontier researchhardest problemsphd level reasoning |
Buy Meta Llama 3.1 405B if…
Choose the Meta Llama 3.1 405B if budget is your top priority — it offers competitive specs at a lower price point.
Buy OpenAI o1-pro if…
The OpenAI o1-pro is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Meta Llama 3.1 405B and OpenAI o1-pro are closely matched ai language models devices with nearly identical overall scores (62 vs 62). The best choice depends on which specific features matter most to you.
Both products score similarly — it depends on your priorities.
Check the latest prices using the buy links above.
Choose the Meta Llama 3.1 405B if budget is your top priority — it offers competitive specs at a lower price point.
The OpenAI o1-pro is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Reviewed by VersusMatrix Editorial Team
Last updated: April 25, 2026
Methodology: AI-powered analysis of technical specifications from manufacturer data. Scores are calculated by comparing products across multiple dimensions and normalized relative to the full category database. Our editorial process is independent and not influenced by affiliate partnerships.