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GPT 6 Luna vs GPT 5.4 Pro

At a glance

OpenAI's fastest, most affordable GPT-6 tier for high-volume, latency-sensitive work.

1.1M ctx$0.10/$0.50 per M

OpenAI's most advanced reasoning model, built on GPT 5.4's unified architecture.

891.1M ctx$30.00/$180.00 per M#5/92
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-10-02
Cheaper100%
Capability
Capability—
Reasoning & Knowledge
Graduate Science90.5%Factual Recall41.4%
Math
Competition Math98.9%Research Math—
Agentic
Novel Reasoning59.3%
Reasoning
CodingInsufficient data
AgenticInsufficient data
MathInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-10-02
Capability
CapabilityECI89.1
Reasoning & Knowledge
Graduate Science5%94.6%Factual Recall12%46.3%
Math
Competition Math—Research Math50.0%
Agentic
Novel Reasoning41%83.3%
Specs
1.1M
Context
128K
Max output
Sep 2026
Released
1.1M
Context
128K
Max output
Mar 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input100%$0.10/M tokens
Output100%$0.50/M tokens
Cache read$0.01/M tokens
Cache write$0.13/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input$30.00/M tokens
Output$180.00/M tokens
Web search$0.01/search
Chat with GPT 6 LunaGo to model
Chat with GPT 5.4 ProGo to model
Frequently Asked Questions: GPT 6 Luna vs GPT 5.4 Pro▼

Which is better, GPT 6 Luna or GPT 5.4 Pro?

▼

Both GPT 6 Luna and GPT 5.4 Pro 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 6 Luna or GPT 5.4 Pro?

▼

GPT 6 Luna has a lower blended cost. GPT 6 Luna: $0.10 input / $0.50 output. GPT 5.4 Pro: $30.00 input / $180.00 output.

Which has a larger context window, GPT 6 Luna or GPT 5.4 Pro?

▼

GPT 6 Luna has a larger context window: GPT 6 Luna supports 1.1M tokens vs GPT 5.4 Pro at 1.1M tokens.

Do both GPT 6 Luna and GPT 5.4 Pro support vision?

▼

Yes, both GPT 6 Luna and GPT 5.4 Pro support vision/image input.

What are the key differences between GPT 6 Luna and GPT 5.4 Pro?

▼

Key differences: GPT 6 Luna is significantly cheaper. 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 6 Luna and GPT 5.4 Pro for free on idapt.app to see which performs better for your specific needs.

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