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Comparison · 2 models · Updated Oct 4, 2026

Claude Haiku 3.5 vs GPT-4o mini

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. Anthropic

    Claude Haiku 3.5

    Released Oct 22, 2024

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

  2. OpenAI

    GPT-4o mini

    Released Jul 18, 2024

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

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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 inputsClaude Haiku 3.5: Text, Images, PDFs · GPT-4o mini: Text, Images, PDFs
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightClaude Haiku 3.5GPT-4o mini
CapabilityCapabilities Index (ECI)67%4949
Inputs & features20%6070
Context window13%3224
Overall100%49/10050/100

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.

Claude Haiku 3.5 vs GPT-4o mini specifications side by side
SpecificationClaude Haiku 3.5AnthropicGPT-4o miniOpenAI
Capability
Capabilities Index (ECI)127.2 (best)126.6
ECI rank#134 of 148 (best)#135 of 148
GPQA DiamondGraduate-level science questions38.1% (best)37.7%
FrontierMath Tiers 1–3Research-level mathematics—0.7%
OTIS Mock AIME 2024–2025Competition mathematics4.3%6.9% (best)
SimpleQA VerifiedShort factual questions—8.3%
Price per million tokens
Input—$0.15
Output—$0.60
Cached input—$0.075
Blended (3:1)—$0.263
Long-context rate—Same rate
Price source—Official 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-mini
API providers—21
ReleasedOct 22, 2024Jul 18, 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—
  • GPT-4o mini$2.70
04 — Questions

Which should you choose?

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

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, Claude Haiku 3.5 or GPT-4o mini?

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

Which can read images, PDFs, audio or video?

Claude Haiku 3.5 accepts text, images and PDFs; GPT-4o mini 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 mini 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: Claude Haiku 3.5 Jul 31, 2024, GPT-4o mini 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 Oct 4, 2026.

05 — Keep comparing

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