Claude 3 Haiku vs GPT-5.2 Codex
GPT-5.2 Codex leads the LLM Stats Score 34.4 to -1.5. Claude 3 Haiku is 9.6x cheaper per token.
Anthropic · OpenAI · Updated for 2026
Which is better?
GPT-5.2 Codex leads the overall LLM Stats Score 34.4 to -1.5, ranking #90 overall.
On price, Claude 3 Haiku is roughly 9.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.2 Codex also accepts a larger context window (400,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude 3 Haiku
- cost matters — it's about 9.6x cheaper per token
Choose GPT-5.2 Codex
- overall performance matters — it scores 34.4 and ranks #90 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you process long inputs — it offers a 400,000 token context window
- you want the most recent training data — it shipped Jan 2026
At a glance
The differences that matter most.
Individual benchmarks
10 reported for Claude 3 Haiku · 3 for GPT-5.2 Codex
Claude 3 Haiku and GPT-5.2 Codexdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude 3 Haiku ($0.25/1M tokens) is 7.0x cheaper than GPT-5.2 Codex ($1.75/1M tokens).
For output processing, Claude 3 Haiku ($1.25/1M tokens) is 11.2x cheaper than GPT-5.2 Codex ($14.00/1M tokens).
In conclusion, GPT-5.2 Codex is more expensive than Claude 3 Haiku.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.2 Codex accepts 400,000 input tokens compared to Claude 3 Haiku's 200,000 tokens. Claude 3 Haiku can generate longer responses up to 200,000 tokens, while GPT-5.2 Codex is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Claude 3 Haiku and GPT-5.2 Codex support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude 3 Haiku
GPT-5.2 Codex
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude 3 Haiku was released on 2024-03-13, while GPT-5.2 Codex was released on 2026-01-14.
GPT-5.2 Codex is 22 months newer than Claude 3 Haiku.
Mar 13, 2024
2.5 years ago
Jan 14, 2026
8 months ago
1.8yr newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Claude 3 Haiku is available from Anthropic, Bedrock, Google. GPT-5.2 Codex is available from OpenAI.
Claude 3 Haiku
GPT-5.2 Codex
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude 3 Haiku and GPT-5.2 Codex side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude 3 Haiku vs GPT-5.2 Codex.