OpenAI's fastest, most affordable GPT-5.6 tier for high-volume, latency-sensitive work.
GPT-5 optimized for code generation and software engineering tasks.
No shared demos for these models yet.
No captured outputs for these models yet.
Both GPT 5.6 Luna and GPT 5 Codex 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.
GPT 5.6 Luna has a lower blended cost. GPT 5.6 Luna: $1.00 input / $6.00 output. GPT 5 Codex: $1.25 input / $10.00 output.
GPT 5.6 Luna has a larger context window: GPT 5.6 Luna supports 1.1M tokens vs GPT 5 Codex at 400K tokens.
Yes, both GPT 5.6 Luna and GPT 5 Codex support vision/image input.
GPT 5.6 Luna and GPT 5 Codex have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.
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 GPT 5 Codex for free on idapt.app to see which performs better for your specific needs.