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GPT 5.6 Luna vs Claude 3.5 Haiku

At a glance
OpenAIGPT 5.6 Luna

OpenAI's fastest, most affordable GPT-5.6 tier for high-volume, latency-sensitive work.

1.1M ctx$1.00/$6.00 per M
AnthropicClaude 3.5 Haiku

Fast and accurate with enhanced coding and tool use capabilities.

61200K ctx$0.80/$4.00 per M#68/92
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
OpenAIGPT 5.6 Luna
Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-11
Capability
Capability—
Reasoning & Knowledge
Graduate Science92.3%Factual Recall—
Math
Math Problems—Competition Math—Research Math—
Coding
Code Editing—
Agentic
Terminal Tasks84.7%
AnthropicClaude 3.5 Haiku
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Capability
CapabilityECI61.4
Reasoning & Knowledge
Graduate Science38.1%Factual Recall6.7%
Math
Math Problems46.4%Competition Math4.3%Research Math0.3%
Coding
Code Editing28.0%
Agentic
Terminal Tasks—
Specs
OpenAIGPT 5.6 Luna
1.1M
Context
128K
Max output
Jul 2026
Released
AnthropicClaude 3.5 Haiku
200K
Context
8K
Max output
Nov 2024
Released
Capabilities
OpenAIGPT 5.6 Luna
Vision
Audio
Reasoning
AnthropicClaude 3.5 Haiku
Vision
Audio
Reasoning
Pricing
OpenAIGPT 5.6 Luna
Live pricing, shown before you run
Input$1.00/M tokens
Output$6.00/M tokens
Cache read$0.10/M tokens
Web search$0.01/search
AnthropicClaude 3.5 Haiku
Live pricing, shown before you run
Input$0.80/M tokens
Output$4.00/M tokens
Cache read$0.08/M tokens
Cache write$1.00/M tokens
Web search$0.01/search
Chat with GPT 5.6 LunaGo to model
Chat with Claude 3.5 HaikuGo to model
Frequently Asked Questions: GPT 5.6 Luna vs Claude 3.5 Haiku▼

Which is better, GPT 5.6 Luna or Claude 3.5 Haiku?

▼

Both GPT 5.6 Luna and Claude 3.5 Haiku are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, GPT 5.6 Luna or Claude 3.5 Haiku?

▼

Claude 3.5 Haiku has a lower blended cost. GPT 5.6 Luna: $1.00 input / $6.00 output. Claude 3.5 Haiku: $0.80 input / $4.00 output.

Which has a larger context window, GPT 5.6 Luna or Claude 3.5 Haiku?

▼

GPT 5.6 Luna has a larger context window: GPT 5.6 Luna supports 1.1M tokens vs Claude 3.5 Haiku at 200K tokens.

Do both GPT 5.6 Luna and Claude 3.5 Haiku support vision?

▼

Yes, both GPT 5.6 Luna and Claude 3.5 Haiku support vision/image input.

What are the key differences between GPT 5.6 Luna and Claude 3.5 Haiku?

▼

Key differences: only GPT 5.6 Luna offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both GPT 5.6 Luna and Claude 3.5 Haiku for free on idapt.app to see which performs better for your specific needs.

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