Claude 3.5 Haiku vs GPT-5.1 Codex High Comparison

Comparing Claude 3.5 Haiku and GPT-5.1 Codex High across benchmarks, pricing, and capabilities.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Claude 3.5 Haiku and GPT-5.1 Codex High don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

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 1.6x cheaper than GPT-5.1 Codex High ($1.25/1M tokens).

For output processing, Claude 3.5 Haiku ($4.00/1M tokens) is 2.5x cheaper than GPT-5.1 Codex High ($10.00/1M tokens).

In conclusion, GPT-5.1 Codex High is more expensive than Claude 3.5 Haiku.*

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

Lowest available price from all providers

Sat Mar 14 2026 • llm-stats.com

Claude 3.5 Haiku

Input tokens$0.80

Output tokens$4.00

Best providerAWS Bedrock

GPT-5.1 Codex High

Input tokens$1.25

Output tokens$10.00

Best providerOpenAI

Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.1 Codex High accepts 400,000 input tokens compared to Claude 3.5 Haiku's 200,000 tokens. Claude 3.5 Haiku can generate longer responses up to 200,000 tokens, while GPT-5.1 Codex High is limited to 128,000 tokens.

Claude 3.5 Haiku

Input200,000 tokens

Output200,000 tokens

GPT-5.1 Codex High

Input400,000 tokens

Output128,000 tokens

Sat Mar 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.1 Codex High supports multimodal inputs, whereas Claude 3.5 Haiku does not.

GPT-5.1 Codex High 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-5.1 Codex High

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-5.1 Codex High

Proprietary

Closed source

Release Timeline

When each model was launched

Claude 3.5 Haiku was released on 2024-10-22, while GPT-5.1 Codex High was released on 2025-11-12.

GPT-5.1 Codex High is 13 months newer than Claude 3.5 Haiku.

Claude 3.5 Haiku

Oct 22, 2024

1.4 years ago

GPT-5.1 Codex High

Nov 12, 2025

4 months ago

1.1yr 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-5.1 Codex High is available from OpenAI. The availability of providers can affect quality of the model and reliability.