Head-to-head

GPT-5.6 Luna vs Claude Sonnet 5

This comparison focuses on two strong general-purpose models that often compete for writing, analysis, and production agent use cases.

2 modelsLive catalog comparison

PriceCurrent TVP token pricing

ContextCurrent listed window sizes

Fast answer

Choose on the workflow, then use live metrics as the tiebreaker

Choose Luna when token cost and OpenAI workflow fit matter most

Data source and freshness

Catalog-backed, not a static price sheet

TVP refreshes this page from the live OpenRouter model catalog. This render used 428 public model records and was synchronized Jul 14, 2026, 9:36 PM UTC. Pricing, availability, and context values can change.

Verify the exact route before sending production traffic, then use the linked model and provider pages as the source for current values. Read the TVP data methodology.

Head to head

Current live model comparison

openai

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...

Context1,050,000

Input$1.00

Output$6.00

file
image
text
tools
structured

Model details Provider page

anthropic

Anthropic: Claude Sonnet 5

Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...

Context1,000,000

Input$2.00

Output$10.00

text
image
file
tools
structured

Model details Provider page

Comparison FAQ

How to use this decision page

Is Claude Sonnet 5 a good GPT alternative?

It can be, depending on your workload. This page helps compare the live context, price, and capability tradeoffs instead of relying on reputation alone.

What should buyers compare first here?

Most teams should compare total route cost, context needs, and whether their workflow depends on a specific provider ecosystem.