OpenAI's balanced GPT-5.6 tier — GPT-5.5-class quality for everyday work at half the price.
The GA release of DeepSeek's open 1.6T-parameter MoE flagship for advanced reasoning and long-horizon agents.
No shared demos for these models yet.
No captured outputs for these models yet.
Both GPT 5.6 Terra and DeepSeek V4 Pro (0813) 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.
DeepSeek V4 Pro (0813) has a lower blended cost. GPT 5.6 Terra: $2.00 input / $12.00 output. DeepSeek V4 Pro (0813): $0.66 input / $1.98 output.
GPT 5.6 Terra has a larger context window: GPT 5.6 Terra supports 1.1M tokens vs DeepSeek V4 Pro (0813) at 1M tokens.
GPT 5.6 Terra supports vision/image input, but DeepSeek V4 Pro (0813) does not.
Key differences: DeepSeek V4 Pro (0813) is significantly cheaper; only GPT 5.6 Terra supports vision input. Compare full specs on this page.
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 Terra and DeepSeek V4 Pro (0813) for free on idapt.app to see which performs better for your specific needs.