Looking for an honest Anthropic Claude 3 Opus vs OpenAI GPT-4.5 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 GPT-4.5 comes out ahead 44/100 to 51/100 — a 7-point gap. The widest gap is in design and build, where the OpenAI GPT-4.5 pulls noticeably ahead.
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OpenAI GPT-4.5 narrowly beats the Anthropic Claude 3 Opus in the ai language models category, especially in design, scoring 51 vs 44. If you want the better overall ai language models, OpenAI GPT-4.5 is the recommended choice.
✓ Pros
✗ Cons
✓ Pros
✗ Cons
Lower cost = better value. Free = open-source self-hosted.
| Metric | 3 Opus | OpenAI GPT-4.5 |
|---|---|---|
| Input (Prompt) | ✓$15.00/1M | $75.00/1M |
| Output (Completion) | ✓$75.00/1M | $150.00/1M |
| Open Source | Proprietary | Proprietary |
Context Window (tokens)
| Metric | 3 Opus | OpenAI GPT-4.5 |
|---|---|---|
| Max Output | 4,096 tok | ✓16,384 tok |
| Speed | 35 tok/s | ✓50 tok/s |
| Time to First Token | 1.2s | ✓900ms |
| Languages | 50+ | 50+ |
Higher is better. Industry-standard AI evaluation benchmarks.
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OpenAI GPT-4.5
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OpenAI GPT-4.5
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OpenAI GPT-4.5
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OpenAI GPT-4.5
| Feature | 3 Opus | OpenAI GPT-4.5 |
|---|---|---|
| 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 GPT-4.5 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Knowledge Cutoff | 2023-08 | 2024-09 |
| Best For | complex analysisresearchlong context | creative writingemotional intelligenceconversationnuanced tasks |
Buy Anthropic Claude 3 Opus if…
Choose the Anthropic Claude 3 Opus if budget is your top priority — it offers competitive specs at a lower price point.
Buy OpenAI GPT-4.5 if…
Buy the OpenAI GPT-4.5 if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.
OpenAI GPT-4.5 narrowly beats the Anthropic Claude 3 Opus in the ai language models category, especially in design, scoring 51 vs 44. If you want the better overall ai language models, OpenAI GPT-4.5 is the recommended choice.
No, OpenAI GPT-4.5 scores higher (75 vs 75).
Check the latest prices using the buy links above.
Choose the Anthropic Claude 3 Opus if budget is your top priority — it offers competitive specs at a lower price point.
Buy the OpenAI GPT-4.5 if you want the best performance 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.
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.