Looking for an honest Anthropic Claude Haiku 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 Haiku 4 comes out ahead 70/100 to 51/100 — a 19-point gap. The widest gap is in display, where the Anthropic Claude Haiku 4 pulls noticeably ahead.
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Anthropic Claude Haiku 4 clearly outperforms the OpenAI GPT-4.5 in the ai language models category, especially in value, scoring 70 vs 51. If you want the better overall ai language models, Anthropic Claude Haiku 4 is the recommended choice.
✓ Pros
✗ Cons
✓ Pros
✗ Cons
Lower cost = better value. Free = open-source self-hosted.
| Metric | Haiku 4 | OpenAI GPT-4.5 |
|---|---|---|
| Input (Prompt) | ✓$0.80/1M | $75.00/1M |
| Output (Completion) | ✓$4.00/1M | $150.00/1M |
| Open Source | Proprietary | Proprietary |
Context Window (tokens)
| Metric | Haiku 4 | OpenAI GPT-4.5 |
|---|---|---|
| Max Output | 8,000 tok | ✓16,384 tok |
| Speed | ✓200 tok/s | 50 tok/s |
| Time to First Token | ✓250ms | 900ms |
| Languages | 50+ | 50+ |
Higher is better. Industry-standard AI evaluation benchmarks.
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| Feature | Haiku 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 | Haiku 4 | OpenAI GPT-4.5 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Knowledge Cutoff | 2025-04 | 2024-09 |
| Best For | fast tasksclassificationsummarizationchat | creative writingemotional intelligenceconversationnuanced tasks |
Buy Anthropic Claude Haiku 4 if…
Buy the Anthropic Claude Haiku 4 if you want the best overall value 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 Haiku 4 clearly outperforms the OpenAI GPT-4.5 in the ai language models category, especially in value, scoring 70 vs 51. If you want the better overall ai language models, Anthropic Claude Haiku 4 is the recommended choice.
Yes, Anthropic Claude Haiku 4 scores higher overall (75 vs 75).
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Buy the Anthropic Claude Haiku 4 if you want the best overall value 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.
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.