GPT-4o vs Claude Haiku 3.5
Claude Haiku 3.5 comes out ahead, 46 to 43 on our weighted score, and it is the cheaper option too.
OpenAIGPT-4o
43/100- ECI129.0
- Price$2.50 / $10.00
- Context128K
- Our pick
AnthropicClaude Haiku 3.5
46/100- ECI127.0
- Price$0.80 / $4.00
- Context200K
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Make it a three-way comparison.
Claude Haiku 3.5 is our pick
Claude Haiku 3.5 is the better all-round choice, scoring 46/100 against GPT-4o (43). It leads on price and context window. GPT-4o wins on capability and inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityGPT-4oCapabilities Index (ECI): GPT-4o 129.0 · Claude Haiku 3.5 127.0
- Lowest priceClaude Haiku 3.5Claude Haiku 3.5 $1.60 · GPT-4o $4.38 per 1M tokens (3:1 blend)
- Longest contextClaude Haiku 3.5Claude Haiku 3.5 200,000 · GPT-4o 128,000 tokens
- Widest inputsSame inputsGPT-4o: Text, Images, PDFs · Claude Haiku 3.5: Text, Images, PDFs
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | GPT-4o | Claude Haiku 3.5 |
|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 51 | 48 |
| Price | 25% | 19 | 38 |
| Inputs & features | 15% | 70 | 60 |
| Context window | 10% | 24 | 32 |
| Overall | 100% | 43/100 | 46/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | GPT-4oOpenAI | Claude Haiku 3.5Anthropic |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | 129.0 (best) | 127.0 |
| ECI rank | #141 of 165 (best) | #147 of 165 |
| GPQA DiamondGraduate-level science questions | 48.9% (best) | 38.1% |
| OTIS Mock AIME 2024–2025Competition mathematics | 6.3% (best) | 4.3% |
| Price per million tokens | ||
| Input | $2.50 | $0.80 (best) |
| Output | $10.00 | $4.00 (best) |
| Cached input | $1.25 | — |
| Blended (3:1) | $4.38 | $1.60 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Official OpenAI API | Median of 3 providers |
| Limits | ||
| Context window | 128,000 tokens | 200,000 tokens (best) |
| Max output | 16,384 tokens (best) | 8,192 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | Yes | Yes |
| Audio | No | No |
| Video | No | No |
| Reasoning | No | No |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | gpt-4o | — |
| API providers | 26 (best) | 4 |
| Released | May 13, 2024 | Oct 22, 2024 |
| Knowledge cutoff | Sep 2023 | Jul 31, 2024 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- GPT-4o$45.00
- Claude Haiku 3.5$16.00
Which should you choose?
Which is better: GPT-4o or Claude Haiku 3.5?
Claude Haiku 3.5 is the better all-round choice, scoring 46/100 against GPT-4o (43). It leads on price and context window. GPT-4o wins on capability and inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, GPT-4o or Claude Haiku 3.5?
Claude Haiku 3.5 is cheaper at $0.80 input / $4.00 output per million tokens (median across 3 API providers). GPT-4o costs $2.50 input / $10.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $1.60 per million tokens for Claude Haiku 3.5 versus $4.38 for GPT-4o (2.7× as much).
Which scores higher on benchmarks?
GPT-4o scores higher on the Capabilities Index (ECI): GPT-4o 129.0 (#141 of 165) and Claude Haiku 3.5 127.0 (#147 of 165). The confidence ranges of the top two overlap (124.7–131.3 vs 121.4–129.2), so treat the gap as small. On individual benchmarks: GPQA Diamond — GPT-4o 48.9%, Claude Haiku 3.5 38.1%; OTIS Mock AIME 2024–2025 — GPT-4o 6.3%, Claude Haiku 3.5 4.3%.
Which is better for coding?
There are no published SWE-bench Verified results for GPT-4o and Claude Haiku 3.5 yet, so there is no like-for-like coding score. On overall capability, GPT-4o leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.
Which has the bigger context window?
Claude Haiku 3.5 has the largest context window at 200,000 tokens, against 128,000 for GPT-4o. Maximum output per response: GPT-4o up to 16,384, Claude Haiku 3.5 up to 8,192 tokens.
Which can read images, PDFs, audio or video?
GPT-4o accepts text, images and PDFs; Claude Haiku 3.5 accepts text, images and PDFs. They handle the same number of input types.
Are any of these open source?
No. GPT-4o and Claude Haiku 3.5 are proprietary and only available through APIs and apps.
Which is newer?
Claude Haiku 3.5 is the newest, released Oct 22, 2024. GPT-4o came out May 13, 2024. Knowledge cutoff: GPT-4o Sep 2023, Claude Haiku 3.5 Jul 31, 2024.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
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