Looking for an honest Anthropic Claude 3 Opus vs OpenAI o3-mini 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. In our overall scoring the OpenAI o3-mini comes out ahead 44/100 to 66/100 — a 22-point gap. The widest gap is in design and build, where the OpenAI o3-mini pulls noticeably ahead.
Anthropic
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OpenAI o3-mini clearly outperforms the Anthropic Claude 3 Opus in the ai language models category, especially in value, scoring 66 vs 44. If you want the better overall ai language models, OpenAI o3-mini is the recommended choice.
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.
✗ Cons
✓ Pros
Lower cost = better value. Free = open-source self-hosted.
| Metric | 3 Opus | OpenAI o3-mini |
|---|---|---|
| Input (Prompt) | $15.00/1M | ✓$1.10/1M |
| Output (Completion) | $75.00/1M | ✓$4.40/1M |
| Open Source | Proprietary | Proprietary |
Context Window (tokens)
| Metric | 3 Opus | OpenAI o3-mini |
|---|---|---|
| Max Output | 4,096 tok | ✓100,000 tok |
| Speed | 35 tok/s | ✓80 tok/s |
| Time to First Token | ✓1.2s | 2.0s |
| Languages | 50+ | 50+ |
Higher is better. Industry-standard AI evaluation benchmarks.
3 Opus
OpenAI o3-mini
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OpenAI o3-mini
| Feature | 3 Opus | OpenAI o3-mini |
|---|---|---|
| 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 Opus | OpenAI o3-mini |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Knowledge Cutoff | 2023-08 | 2023-10 |
| Best For | complex analysisresearchlong context | reasoningcodingmathcost efficiency |
Buy Anthropic Claude 3 Opus if…
The Anthropic Claude 3 Opus is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Buy OpenAI o3-mini if…
Buy the OpenAI o3-mini if you want the best camera quality in this comparison. It scores higher overall and is the recommended choice for most buyers.
OpenAI o3-mini clearly outperforms the Anthropic Claude 3 Opus in the ai language models category, especially in value, scoring 66 vs 44. If you want the better overall ai language models, OpenAI o3-mini is the recommended choice.
No, OpenAI o3-mini scores higher (75 vs 75).
Check the latest prices using the buy links above.
The Anthropic Claude 3 Opus is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Buy the OpenAI o3-mini if you want the best camera quality in this comparison. It scores higher overall and is the recommended choice for most buyers.
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.
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