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Select two models to compare their pricing, performance benchmarks, capabilities, and technical specifications side by side.

Model 1

Model 2

OpenAI: GPT-5.6 Luna

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Input Price

Cost per 1M input tokens

$0.20/M tokens

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Output Price

Cost per 1M output tokens

$1.20/M tokens

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Cache Read Price

Cost per 1M cached tokens

$0.02/M tokens

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Cache Write Price

Cost to write 1M tokens to cache

$0.25/M tokens

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Context Window

Maximum tokens the model can process

1,050,000 tokens

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Max Output Tokens

Maximum tokens in model response

128,000 tokens

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Input Modalities

Supported input types

file, image, text

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Output Modalities

Supported output types

text

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Function Calling

Can call external functions/APIs

✓ Supported

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Tool Choice

Control over function selection

✓ Supported

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Structured Outputs

JSON schema validation

✓ Supported

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Reasoning Tokens

Extended thinking for complex problems

✓ Supported

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Content Moderation

Content filtering status

Enabled

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Model ID

openai/gpt-5.6-luna

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Tokenizer

GPT

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Created On OpenRouter

Jul 9, 2026

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