Model Comparison

GPT-5.4 vs Claude Haiku 4.5Which is better in 2026?

GPT-5.4 significantly outperforms across most benchmarks. Claude Haiku 4.5 is 2.8x cheaper per token.

Verdict: GPT-5.4 vs Claude Haiku 4.5 — which is better?

GPT-5.4 (by OpenAI) and Claude Haiku 4.5 (by Anthropic) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

GPT-5.4 outperforms in 2 benchmarks (GPQA, Tau2 Telecom), while Claude Haiku 4.5 is better at 0 benchmarks. GPT-5.4 significantly outperforms across most benchmarks.

On price, Claude Haiku 4.5 is roughly 2.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5.4 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose GPT-5.4 if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Mar 2026

Choose Claude Haiku 4.5 if…

  • cost matters — it's about 2.8x cheaper per token
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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT-5.4 outperforms in 2 benchmarks (GPQA, Tau2 Telecom), while Claude Haiku 4.5 is better at 0 benchmarks.

GPT-5.4 significantly outperforms across most benchmarks.

Sun Jun 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Claude Haiku 4.5 costs less

For input processing, GPT-5.4 ($2.50/1M tokens) is 2.5x more expensive than Claude Haiku 4.5 ($1.00/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 3.0x more expensive than Claude Haiku 4.5 ($5.00/1M tokens).

In conclusion, GPT-5.4 is more expensive than Claude Haiku 4.5.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sun Jun 07 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
Anthropic
Claude Haiku 4.5
Input tokens$1.00
Output tokens$5.00
Best providerAnthropic
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.4 accepts 1,000,000 input tokens compared to Claude Haiku 4.5's 200,000 tokens. GPT-5.4 can generate longer responses up to 128,000 tokens, while Claude Haiku 4.5 is limited to 64,000 tokens.

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
Anthropic
Claude Haiku 4.5
Input200,000 tokens
Output64,000 tokens
Sun Jun 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.4 and Claude Haiku 4.5 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

GPT-5.4

Text
Images
Audio
Video

Claude Haiku 4.5

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT-5.4

Proprietary

Closed source

Claude Haiku 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while Claude Haiku 4.5 was released on 2025-10-15.

GPT-5.4 is 5 months newer than Claude Haiku 4.5.

GPT-5.4

Mar 5, 2026

3 months ago

4mo newer
Claude Haiku 4.5

Oct 15, 2025

7 months ago

Knowledge Cutoff

When training data ends

Claude Haiku 4.5 has a documented knowledge cutoff of 2025-02-01, while GPT-5.4's cutoff date is not specified.

We can confirm Claude Haiku 4.5's training data extends to 2025-02-01, but cannot make a direct comparison without GPT-5.4's cutoff date.

GPT-5.4

—

Claude Haiku 4.5

Feb 2025

Provider Availability

GPT-5.4 is available from OpenAI. Claude Haiku 4.5 is available from Anthropic, Vertex AI.

GPT-5.4

openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M

Claude Haiku 4.5

anthropic logo
Anthropic
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M
vertex logo
Unknown Organization
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (1,000,000 tokens)
Higher GPQA score (92.8% vs 73.0%)
Higher Tau2 Telecom score (98.9% vs 83.0%)
Anthropic
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.4
Anthropic
Claude Haiku 4.5

FAQ

Common questions about GPT-5.4 vs Claude Haiku 4.5.

Which is better, GPT-5.4 or Claude Haiku 4.5?

GPT-5.4 significantly outperforms across most benchmarks. GPT-5.4 is made by OpenAI and Claude Haiku 4.5 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5.4 compare to Claude Haiku 4.5 in benchmarks?

GPT-5.4 scores Tau2 Telecom: 98.9%, ARC-AGI: 93.7%, Graphwalks BFS <128k: 93.0%, GPQA: 92.8%, Graphwalks parents <128k: 89.8%. Claude Haiku 4.5 scores Tau2 Retail: 83.2%, MMMLU: 83.0%, Tau2 Telecom: 83.0%, AIME 2025: 80.7%, SWE-Bench Verified: 73.3%.

Is GPT-5.4 cheaper than Claude Haiku 4.5?

Claude Haiku 4.5 is 2.5x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. Claude Haiku 4.5 costs $1.00/M input and $5.00/M output via anthropic.

What are the context window sizes for GPT-5.4 and Claude Haiku 4.5?

GPT-5.4 supports 1.0M tokens and Claude Haiku 4.5 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-5.4 and Claude Haiku 4.5?

Key differences include context window (1.0M vs 200K), input pricing ($2.50 vs $1.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.4 and Claude Haiku 4.5?

GPT-5.4 is developed by OpenAI and Claude Haiku 4.5 is developed by Anthropic.

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