ZMIME
Comparison · 3 models · Updated Oct 4, 2026

GPT-5.4 mini vs Claude Haiku 4.5 vs Grok 4.3

Grok 4.3 comes out ahead, 67 to 63 and 58 on our weighted score, and it is the cheaper option too.

  1. OpenAI

    GPT-5.4 mini

    Released Mar 17, 2026

    63/100
    • ECI148.8
    • Price$0.75 / $4.50
    • Context400K
    Full specs Remove GPT-5.4 mini

  2. Anthropic

    Claude Haiku 4.5

    Released Oct 15, 2025

    58/100
    • ECI142.4
    • Price$1.00 / $5.00
    • Context200K
    Full specs Remove Claude Haiku 4.5
  3. Our pick

    xAI

    Grok 4.3

    Released Apr 17, 2026

    67/100
    • ECI149.2
    • Price$1.25 / $2.50
    • Context1M
    Full specs Remove Grok 4.3
01 — Verdict

Grok 4.3 is our pick

Grok 4.3 is the better all-round choice, scoring 67/100 against GPT-5.4 mini (63) and Claude Haiku 4.5 (58). It leads on context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityGrok 4.3Capabilities Index (ECI): Grok 4.3 149.2 · GPT-5.4 mini 148.8 · Claude Haiku 4.5 142.4
  • Lowest priceGrok 4.3Grok 4.3 $1.56 · GPT-5.4 mini $1.69 · Claude Haiku 4.5 $2.00 per 1M tokens (3:1 blend)
  • Longest contextGrok 4.3Grok 4.3 1,000,000 · GPT-5.4 mini 400,000 · Claude Haiku 4.5 200,000 tokens
  • Widest inputsClaude Haiku 4.5 and Grok 4.3GPT-5.4 mini: Text, Images · Claude Haiku 4.5: Text, Images, PDFs · Grok 4.3: Text, Images, PDFs
  • Self-hostingNo open weightsAll three are available only through APIs
How the score is built
MeasureWeightGPT-5.4 miniClaude Haiku 4.5Grok 4.3
CapabilityCapabilities Index (ECI)50%776977
Price25%393641
Inputs & features15%708080
Context window10%443260
Overall100%63/10058/10067/100
02 — Side by side

Every spec in one table

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

GPT-5.4 mini vs Claude Haiku 4.5 vs Grok 4.3 specifications side by side
SpecificationGPT-5.4 miniOpenAIClaude Haiku 4.5AnthropicGrok 4.3xAI
Capability
Capabilities Index (ECI)148.8142.4149.2 (best)
ECI rank#56 of 148#90 of 148#55 of 148 (best)
GPQA DiamondGraduate-level science questions86.9%71.2%88.8% (best)
FrontierMath Tiers 1–3Research-level mathematics51.2% (best)—42.8%
OTIS Mock AIME 2024–2025Competition mathematics88.9%66.7%93.3% (best)
SimpleQA VerifiedShort factual questions29.4%13.2%33.2% (best)
Price per million tokens
Input$0.75 (best)$1.00$1.25
Output$4.50$5.00$2.50 (best)
Cached input$0.075 (best)$0.10$0.20
Blended (3:1)$1.69$2.00$1.56 (best)
Long-context rateSame rateSame rateOver 200K: $2.50 / $5.00
Price sourceOfficial OpenAI APIOfficial Anthropic APIOfficial xAI API
Limits
Context window400,000 tokens200,000 tokens1,000,000 tokens (best)
Max output128,000 tokens (best)64,000 tokens30,000 tokens
Inputs and features
TextYesYesYes
ImagesYesYesYes
PDFsNoYesYes
AudioNoNoNo
VideoNoNoNo
ReasoningYeslow · medium · high · xhighYesYeslow · medium · high
Tool callingYesYesYes
Structured outputYesYesYes
Availability
WeightsProprietaryProprietaryProprietary
API model IDgpt-5.4-miniclaude-haiku-4-5grok-4.3
API providers2934 (best)27
ReleasedMar 17, 2026Oct 15, 2025Apr 17, 2026
Knowledge cutoffAug 31, 2025Feb 28, 2025—
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-5.4 mini$16.50
  • Claude Haiku 4.5$20.00
  • Grok 4.3$17.50
04 — Questions

Which should you choose?

Which is better: GPT-5.4 mini, Claude Haiku 4.5 or Grok 4.3?

Grok 4.3 is the better all-round choice, scoring 67/100 against GPT-5.4 mini (63) and Claude Haiku 4.5 (58). It leads on context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, GPT-5.4 mini, Claude Haiku 4.5 or Grok 4.3?

Grok 4.3 is cheaper at $1.25 input / $2.50 output per million tokens (official xAI API price). GPT-5.4 mini costs $0.75 input / $4.50 output per million tokens (official OpenAI API price); Claude Haiku 4.5 costs $1.00 input / $5.00 output per million tokens (official Anthropic API price). At a typical mix of three input tokens to one output token, that is $1.56 per million tokens for Grok 4.3 versus $1.69 for GPT-5.4 mini (1.1× as much) and $2.00 for Claude Haiku 4.5 (1.3× as much).

Which scores higher on benchmarks?

Grok 4.3 scores higher on the Capabilities Index (ECI): Grok 4.3 149.2 (#55 of 148), GPT-5.4 mini 148.8 (#56 of 148) and Claude Haiku 4.5 142.4 (#90 of 148). The confidence ranges of the top two overlap (147.6–150.8 vs 147.1–150.5), so treat the gap as small. On individual benchmarks: GPQA Diamond — Grok 4.3 88.8%, GPT-5.4 mini 86.9%, Claude Haiku 4.5 71.2%; OTIS Mock AIME 2024–2025 — Grok 4.3 93.3%, GPT-5.4 mini 88.9%, Claude Haiku 4.5 66.7%; SimpleQA Verified — Grok 4.3 33.2%, GPT-5.4 mini 29.4%, Claude Haiku 4.5 13.2%.

Which is better for coding?

There are no published SWE-bench Verified results for GPT-5.4 mini, Claude Haiku 4.5 and Grok 4.3 yet, so there is no like-for-like coding score. On overall capability, Grok 4.3 leads, which tends to carry over to coding, but test on your own codebase. All three support tool calling for agent workflows.

Which has the bigger context window?

Grok 4.3 has the largest context window at 1,000,000 tokens, against 400,000 for GPT-5.4 mini and 200,000 for Claude Haiku 4.5. Maximum output per response: GPT-5.4 mini up to 128,000, Claude Haiku 4.5 up to 64,000, Grok 4.3 up to 30,000 tokens.

Which can read images, PDFs, audio or video?

GPT-5.4 mini accepts text and images; Claude Haiku 4.5 accepts text, images and PDFs; Grok 4.3 accepts text, images and PDFs. Claude Haiku 4.5 handles the widest range of inputs.

Are any of these open source?

No. GPT-5.4 mini, Claude Haiku 4.5 and Grok 4.3 are proprietary and only available through APIs and apps.

Which is newer?

Grok 4.3 is the newest, released Apr 17, 2026. GPT-5.4 mini came out Mar 17, 2026; Claude Haiku 4.5 came out Oct 15, 2025. Knowledge cutoff: GPT-5.4 mini Aug 31, 2025, Claude Haiku 4.5 Feb 28, 2025.

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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