Model Comparison

GPT-5.2 vs Claude Haiku 4.5

GPT-5.2 significantly outperforms across most benchmarks. Claude Haiku 4.5 is 2.4x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

GPT-5.2 outperforms in 5 benchmarks (AIME 2025, GPQA, MMMLU, SWE-Bench Verified, Tau2 Telecom), while Claude Haiku 4.5 is better at 1 benchmark (Tau2 Retail).

GPT-5.2 significantly outperforms across most benchmarks.

Fri Apr 17 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-5.2 ($1.75/1M tokens) is 1.8x more expensive than Claude Haiku 4.5 ($1.00/1M tokens).

For output processing, GPT-5.2 ($14.00/1M tokens) is 2.8x more expensive than Claude Haiku 4.5 ($5.00/1M tokens).

In conclusion, GPT-5.2 is more expensive than Claude Haiku 4.5.*

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

Lowest available price from all providers
Fri Apr 17 2026 • llm-stats.com
OpenAI
GPT-5.2
Input tokens$1.75
Output tokens$14.00
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-5.2 accepts 400,000 input tokens compared to Claude Haiku 4.5's 200,000 tokens. GPT-5.2 can generate longer responses up to 128,000 tokens, while Claude Haiku 4.5 is limited to 64,000 tokens.

OpenAI
GPT-5.2
Input400,000 tokens
Output128,000 tokens
Anthropic
Claude Haiku 4.5
Input200,000 tokens
Output64,000 tokens
Fri Apr 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.2 and Claude Haiku 4.5 support multimodal inputs.

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

GPT-5.2

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-5.2

Proprietary

Closed source

Claude Haiku 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.2 was released on 2025-12-11, while Claude Haiku 4.5 was released on 2025-10-15.

GPT-5.2 is 2 months newer than Claude Haiku 4.5.

GPT-5.2

Dec 11, 2025

4 months ago

1mo newer
Claude Haiku 4.5

Oct 15, 2025

6 months ago

Knowledge Cutoff

When training data ends

GPT-5.2 has a knowledge cutoff of 2025-08-25, while Claude Haiku 4.5 has a cutoff of 2025-02-01.

GPT-5.2 has more recent training data (up to 2025-08-25), making it potentially better informed about events through that date compared to Claude Haiku 4.5 (2025-02-01).

GPT-5.2

Aug 2025

6 mo newer
Claude Haiku 4.5

Feb 2025

Provider Availability

GPT-5.2 is available from OpenAI. Claude Haiku 4.5 is available from Anthropic.

GPT-5.2

openai logo
OpenAI
Input Price:Input: $1.75/1MOutput Price:Output: $14.00/1M

Claude Haiku 4.5

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

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (400,000 tokens)
Higher AIME 2025 score (100.0% vs 80.7%)
Higher GPQA score (92.4% vs 73.0%)
Higher MMMLU score (89.6% vs 83.0%)
Higher SWE-Bench Verified score (80.0% vs 73.3%)
Higher Tau2 Telecom score (98.7% vs 83.0%)
Anthropic
Less expensive input tokens
Less expensive output tokens
Higher Tau2 Retail score (83.2% vs 82.0%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.2
Anthropic
Claude Haiku 4.5

FAQ

Common questions about GPT-5.2 vs Claude Haiku 4.5

GPT-5.2 significantly outperforms across most benchmarks. GPT-5.2 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.
GPT-5.2 scores AIME 2025: 100.0%, HMMT 2025: 99.4%, Tau2 Telecom: 98.7%, Graphwalks BFS <128k: 94.0%, GPQA: 92.4%. 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%.
Claude Haiku 4.5 is 1.8x cheaper for input tokens. GPT-5.2 costs $1.75/M input and $14.00/M output via openai. Claude Haiku 4.5 costs $1.00/M input and $5.00/M output via anthropic.
GPT-5.2 supports 400K 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.
Key differences include context window (400K vs 200K), input pricing ($1.75 vs $1.00/M). See the full comparison above for benchmark-by-benchmark results.
GPT-5.2 is developed by OpenAI and Claude Haiku 4.5 is developed by Anthropic.