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Comparison · 2 models · Updated Oct 4, 2026

GPT-4o mini vs Claude Haiku 3.5

Too close to call on our weighted score (GPT-4o mini 50, Claude Haiku 3.5 49). The right pick depends on what you value most.

  1. OpenAI

    GPT-4o mini

    Released Jul 18, 2024

    50/100
    • ECI126.6
    • Price$0.15 / $0.60
    • Context128K
    Full specs Remove GPT-4o mini

  2. Anthropic

    Claude Haiku 3.5

    Released Oct 22, 2024

    49/100
    • ECI127.2
    • Price—
    • Context200K
    Full specs Remove Claude Haiku 3.5

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01 — Verdict

Too close to call

It is close. Our weighted score puts them within a point (GPT-4o mini 50/100, Claude Haiku 3.5 49/100), so choose by what matters most for your work: Claude Haiku 3.5 for raw capability and GPT-4o mini on price. The score weighs capability 67%, inputs & features 20%, context window 13%.

  • CapabilityClaude Haiku 3.5Capabilities Index (ECI): Claude Haiku 3.5 127.2 · GPT-4o mini 126.6
  • Lowest priceGPT-4o miniGPT-4o mini $0.263 per 1M tokens (3:1 blend) · Claude Haiku 3.5 unpriced
  • Longest contextClaude Haiku 3.5Claude Haiku 3.5 200,000 · GPT-4o mini 128,000 tokens
  • Widest inputsSame inputsGPT-4o mini: Text, Images, PDFs · Claude Haiku 3.5: Text, Images, PDFs
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGPT-4o miniClaude Haiku 3.5
CapabilityCapabilities Index (ECI)67%4949
Inputs & features20%7060
Context window13%2432
Overall100%50/10049/100

Left out because at least one model lacks the data: price. The remaining weights were rescaled.

02 — Side by side

Every spec in one table

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

GPT-4o mini vs Claude Haiku 3.5 specifications side by side
SpecificationGPT-4o miniOpenAIClaude Haiku 3.5Anthropic
Capability
Capabilities Index (ECI)126.6127.2 (best)
ECI rank#135 of 148#134 of 148 (best)
GPQA DiamondGraduate-level science questions37.7%38.1% (best)
FrontierMath Tiers 1–3Research-level mathematics0.7%—
OTIS Mock AIME 2024–2025Competition mathematics6.9% (best)4.3%
SimpleQA VerifiedShort factual questions8.3%—
Price per million tokens
Input$0.15—
Output$0.60—
Cached input$0.075—
Blended (3:1)$0.263—
Long-context rateSame rate—
Price sourceOfficial OpenAI API—
Limits
Context window128,000 tokens200,000 tokens (best)
Max output16,384 tokens (best)8,192 tokens
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesYes
AudioNoNo
VideoNoNo
ReasoningNoNo
Tool callingYesYes
Structured outputYesNo
Availability
WeightsProprietaryProprietary
API model IDgpt-4o-mini—
API providers21—
ReleasedJul 18, 2024Oct 22, 2024
Knowledge cutoffSep 2023Jul 31, 2024
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.

  • GPT-4o mini$2.70
  • Claude Haiku 3.5—
04 — Questions

Which should you choose?

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

It is close. Our weighted score puts them within a point (GPT-4o mini 50/100, Claude Haiku 3.5 49/100), so choose by what matters most for your work: Claude Haiku 3.5 for raw capability and GPT-4o mini on price. The score weighs capability 67%, inputs & features 20%, context window 13%.

Which is cheaper, GPT-4o mini or Claude Haiku 3.5?

GPT-4o mini is cheaper at $0.15 input / $0.60 output per million tokens (official OpenAI API price). . At a typical mix of three input tokens to one output token, that is $0.263 per million tokens for GPT-4o mini versus . Claude Haiku 3.5 has no published per-token price.

Which scores higher on benchmarks?

Claude Haiku 3.5 scores higher on the Capabilities Index (ECI): Claude Haiku 3.5 127.2 (#134 of 148) and GPT-4o mini 126.6 (#135 of 148). The confidence ranges of the top two overlap (120.7–129.7 vs 120.5–128.5), so treat the gap as small. On individual benchmarks: GPQA Diamond — Claude Haiku 3.5 38.1%, GPT-4o mini 37.7%; OTIS Mock AIME 2024–2025 — GPT-4o mini 6.9%, Claude Haiku 3.5 4.3%.

Which is better for coding?

There are no published SWE-bench Verified results for GPT-4o mini and Claude Haiku 3.5 yet, so there is no like-for-like coding score. On overall capability, Claude Haiku 3.5 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 mini. Maximum output per response: GPT-4o mini up to 16,384, Claude Haiku 3.5 up to 8,192 tokens.

Which can read images, PDFs, audio or video?

GPT-4o mini 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 mini 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 mini came out Jul 18, 2024. Knowledge cutoff: GPT-4o mini 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 Oct 4, 2026.

05 — Keep comparing

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