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Comparison · 2 models · Updated Nov 2, 2026

Claude Haiku 3.5 vs GPT-4o

Claude Haiku 3.5 comes out ahead, 46 to 43 on our weighted score, and it is the cheaper option too.

  1. Our pick

    Anthropic

    Claude Haiku 3.5

    Released Oct 22, 2024

    46/100
    • ECI127.0
    • Price$0.80 / $4.00
    • Context200K
    Full specs Remove Claude Haiku 3.5

  2. OpenAI

    GPT-4o

    Released May 13, 2024

    43/100
    • ECI129.0
    • Price$2.50 / $10.00
    • Context128K
    Full specs Remove GPT-4o

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

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 inputsClaude Haiku 3.5: Text, Images, PDFs · GPT-4o: Text, Images, PDFs
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightClaude Haiku 3.5GPT-4o
CapabilityCapabilities Index (ECI)50%4851
Price25%3819
Inputs & features15%6070
Context window10%3224
Overall100%46/10043/100
02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Claude Haiku 3.5 vs GPT-4o specifications side by side
SpecificationClaude Haiku 3.5AnthropicGPT-4oOpenAI
Capability
Capabilities Index (ECI)127.0129.0 (best)
ECI rank#147 of 165#141 of 165 (best)
GPQA DiamondGraduate-level science questions38.1%48.9% (best)
OTIS Mock AIME 2024–2025Competition mathematics4.3%6.3% (best)
Price per million tokens
Input$0.80 (best)$2.50
Output$4.00 (best)$10.00
Cached input—$1.25
Blended (3:1)$1.60 (best)$4.38
Long-context rateSame rateSame rate
Price sourceMedian of 3 providersOfficial OpenAI API
Limits
Context window200,000 tokens (best)128,000 tokens
Max output8,192 tokens16,384 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesYes
AudioNoNo
VideoNoNo
ReasoningNoNo
Tool callingYesYes
Structured outputNoYes
Availability
WeightsProprietaryProprietary
API model ID—gpt-4o
API providers426 (best)
ReleasedOct 22, 2024May 13, 2024
Knowledge cutoffJul 31, 2024Sep 2023
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • Claude Haiku 3.5$16.00
  • GPT-4o$45.00
04 — Questions

Which should you choose?

Which is better: Claude Haiku 3.5 or GPT-4o?

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, Claude Haiku 3.5 or GPT-4o?

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 Claude Haiku 3.5 and GPT-4o 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: Claude Haiku 3.5 up to 8,192, GPT-4o up to 16,384 tokens.

Which can read images, PDFs, audio or video?

Claude Haiku 3.5 accepts text, images and PDFs; GPT-4o accepts text, images and PDFs. They handle the same number of input types.

Are any of these open source?

No. Claude Haiku 3.5 and GPT-4o 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: Claude Haiku 3.5 Jul 31, 2024, GPT-4o Sep 2023.

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.

05 — Keep comparing

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