Model Comparison

Claude 3.5 Haiku vs GPT-4.5Which is better in 2026?

GPT-4.5 has a slight edge in benchmark performance. Claude 3.5 Haiku is 58.6x cheaper per token.

Verdict: Claude 3.5 Haiku vs GPT-4.5 — which is better?

Claude 3.5 Haiku (by Anthropic) and GPT-4.5 (by OpenAI) 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.

Claude 3.5 Haiku outperforms in 2 benchmarks (HumanEval, SWE-Bench Verified), while GPT-4.5 is better at 3 benchmarks (GPQA, TAU-bench Airline, TAU-bench Retail). GPT-4.5 has a slight edge in benchmark performance.

On price, Claude 3.5 Haiku is roughly 58.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude 3.5 Haiku also accepts a larger context window (200,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude 3.5 Haiku if…

  • cost matters — it's about 58.6x cheaper per token
  • you process long inputs — it offers a 200,000 token context window

Choose GPT-4.5 if…

  • you want the strongest raw capability — it leads on 3 of 5 shared benchmarks
  • you want the most recent training data — it shipped Feb 2025

Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Claude 3.5 Haiku outperforms in 2 benchmarks (HumanEval, SWE-Bench Verified), while GPT-4.5 is better at 3 benchmarks (GPQA, TAU-bench Airline, TAU-bench Retail).

GPT-4.5 has a slight edge in benchmark performance.

Wed Jul 01 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Claude 3.5 Haiku costs less

For input processing, Claude 3.5 Haiku ($0.80/1M tokens) is 93.8x cheaper than GPT-4.5 ($75.00/1M tokens).

For output processing, Claude 3.5 Haiku ($4.00/1M tokens) is 37.5x cheaper than GPT-4.5 ($150.00/1M tokens).

In conclusion, GPT-4.5 is more expensive than Claude 3.5 Haiku.*

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

Lowest available price from all providers
Wed Jul 01 2026 • llm-stats.com
Anthropic
Claude 3.5 Haiku
Input tokens$0.80
Output tokens$4.00
Best providerAWS Bedrock
OpenAI
GPT-4.5
Input tokens$75.00
Output tokens$150.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude 3.5 Haiku accepts 200,000 input tokens compared to GPT-4.5's 128,000 tokens. Claude 3.5 Haiku can generate longer responses up to 200,000 tokens, while GPT-4.5 is limited to 4,096 tokens.

Anthropic
Claude 3.5 Haiku
Input200,000 tokens
Output200,000 tokens
OpenAI
GPT-4.5
Input128,000 tokens
Output4,096 tokens
Wed Jul 01 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-4.5 supports multimodal inputs, whereas Claude 3.5 Haiku does not.

GPT-4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude 3.5 Haiku

Text
Images
Audio
Video

GPT-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.

Claude 3.5 Haiku

Proprietary

Closed source

GPT-4.5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude 3.5 Haiku was released on 2024-10-22, while GPT-4.5 was released on 2025-02-27.

GPT-4.5 is 4 months newer than Claude 3.5 Haiku.

Claude 3.5 Haiku

Oct 22, 2024

1.7 years ago

GPT-4.5

Feb 27, 2025

1.3 years ago

4mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude 3.5 Haiku is available from Bedrock, Google, Anthropic. GPT-4.5 is available from OpenAI.

Claude 3.5 Haiku

bedrock logo
AWS Bedrock
Input Price:Input: $0.80/1MOutput Price:Output: $4.00/1M
google logo
Google
Input Price:Input: $0.80/1MOutput Price:Output: $4.00/1M
anthropic logo
Anthropic
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M

GPT-4.5

openai logo
OpenAI
Input Price:Input: $75.00/1MOutput Price:Output: $150.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Less expensive input tokens
Less expensive output tokens
Higher HumanEval score (88.1% vs 88.0%)
Higher SWE-Bench Verified score (40.6% vs 38.0%)
OpenAI
Supports multimodal inputs
Higher GPQA score (69.5% vs 41.6%)
Higher TAU-bench Airline score (50.0% vs 22.8%)
Higher TAU-bench Retail score (68.4% vs 51.0%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude 3.5 Haiku and GPT-4.5 side-by-side, then vote on the output you prefer.

Claude 3.5 Haiku
✓ Preferred
GPT-4.5
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude 3.5 Haiku
OpenAI
GPT-4.5

FAQ

Common questions about Claude 3.5 Haiku vs GPT-4.5.

Which is better, Claude 3.5 Haiku or GPT-4.5?

GPT-4.5 has a slight edge in benchmark performance. Claude 3.5 Haiku is made by Anthropic and GPT-4.5 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude 3.5 Haiku compare to GPT-4.5 in benchmarks?

Claude 3.5 Haiku scores HumanEval: 88.1%, MGSM: 85.6%, DROP: 83.1%, MATH: 69.4%, MMLU-Pro: 65.0%. GPT-4.5 scores GSM8k: 97.0%, MMLU: 90.8%, CharXiv-D: 90.0%, IFEval: 88.2%, HumanEval: 88.0%.

Is Claude 3.5 Haiku cheaper than GPT-4.5?

Claude 3.5 Haiku is 93.8x cheaper for input tokens. Claude 3.5 Haiku costs $0.80/M input and $4.00/M output via bedrock. GPT-4.5 costs $75.00/M input and $150.00/M output via openai.

What are the context window sizes for Claude 3.5 Haiku and GPT-4.5?

Claude 3.5 Haiku supports 200K tokens and GPT-4.5 supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude 3.5 Haiku and GPT-4.5?

Key differences include context window (200K vs 128K), input pricing ($0.80 vs $75.00/M), multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude 3.5 Haiku and GPT-4.5?

Claude 3.5 Haiku is developed by Anthropic and GPT-4.5 is developed by OpenAI.

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