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Claude 3 Haiku vs GPT-5.6 Luna

How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Claude 3 Haiku and GPT-5.6 Luna.

Anthropic

Claude 3 Haiku

Claude 3 Haiku is Anthropic's fastest and most compact model for near-instant responsiveness. Quick and accurate targeted performance. See the launch announcement and benchmark results [here](https://www.anthropic.com/news/claude-3-haiku) #multimodal

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OpenAI

GPT-5.6 Luna

GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...

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Technical Specifications

SpecificationClaude 3 HaikuGPT-5.6 Luna
ProviderAnthropicOpenAI
Context Window200,000 tokens1,050,000 tokens
Agent SuitabilityN/AN/A
Time to First Token (TTFT)N/AN/A
Deployment Modelmanaged apimanaged api
Production Stabilitystablebeta
API AvailableYesYes
Released Date2024-03-132026-07-09

API Pricing Comparison

Input Price per Million Tokens

Claude 3 Haiku

$0.25

GPT-5.6 Luna

$1.00

Output Price per Million Tokens

Claude 3 Haiku

$1.25

GPT-5.6 Luna

$6.00

Want to test both models live?

Run side-by-side prompt prompts in our dynamic Sandbox. Check execution speeds, latency metrics, and compute actual costs in real-time.

Benchmark Performance Metrics

Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.

MMLUGeneral knowledge & multi-task understanding
7520.0%vsN/A
Claude 3 Haiku
GPT-5.6 Luna
HumanEvalPython coding & logic synthesis
7590.0%vsN/A
Claude 3 Haiku
GPT-5.6 Luna
MATHComplex mathematical problem solving
3890.0%vsN/A
Claude 3 Haiku
GPT-5.6 Luna
GPQAGraduate-level expert reasoning
3200.0%vsN/A
Claude 3 Haiku
GPT-5.6 Luna
HellaSwagCommonsense reasoning and inference
8810.0%vsN/A
Claude 3 Haiku
GPT-5.6 Luna
MT-BenchMulti-turn conversation flow quality
800.0%vsN/A
Claude 3 Haiku
GPT-5.6 Luna

Claude 3 Haiku Quirks & Gotchas

No developer gotchas reported.

GPT-5.6 Luna Quirks & Gotchas

No developer gotchas reported.