Looking for an honest Anthropic Claude Opus 4 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 Anthropic Claude Opus 4 comes out ahead 68/100 to 51/100 — a 17-point gap. The widest gap is in camera quality, where the Anthropic Claude Opus 4 pulls noticeably ahead.
Anthropic
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Anthropic Claude Opus 4 clearly outperforms the OpenAI GPT-4.5 in the ai language models category, especially in value, scoring 68 vs 51. If you want the better overall ai language models, Anthropic Claude Opus 4 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.
✓ Pros
✗ Cons
Lower cost = better value. Free = open-source self-hosted.
| Metric | Opus 4 | 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 | Opus 4 | OpenAI GPT-4.5 |
|---|---|---|
| Max Output | ✓32,000 tok | 16,384 tok |
| Speed | ✓60 tok/s | 50 tok/s |
| Time to First Token | 900ms | 900ms |
| Languages | 50+ | 50+ |
Higher is better. Industry-standard AI evaluation benchmarks.
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| Feature | Opus 4 | 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 | Opus 4 | OpenAI GPT-4.5 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Knowledge Cutoff | 2025-04 | 2024-09 |
| Best For | complex reasoningresearchadvanced codinglong form | creative writingemotional intelligenceconversationnuanced tasks |
Buy Anthropic Claude Opus 4 if…
Buy the Anthropic Claude Opus 4 if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.
Buy OpenAI GPT-4.5 if…
The OpenAI GPT-4.5 is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Anthropic Claude Opus 4 clearly outperforms the OpenAI GPT-4.5 in the ai language models category, especially in value, scoring 68 vs 51. If you want the better overall ai language models, Anthropic Claude Opus 4 is the recommended choice.
Yes, Anthropic Claude Opus 4 scores higher overall (75 vs 75).
Check the latest prices using the buy links above.
Buy the Anthropic Claude Opus 4 if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.
The OpenAI GPT-4.5 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 28, 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.