GPT-5.6 series is now available via CometAPI — Chat and Responses API supported

Just sharing an update for anyone testing different GPT models or maintaining multi-model AI workflows.

CometAPI has added the GPT-5.6 series:

• gpt-5.6
• gpt-5.6-sol
• gpt-5.6-terra
• gpt-5.6-luna

All four support both Chat API and Responses API formats.

From the current model positioning:

• gpt-5.6 and gpt-5.6-sol are aimed at more complex reasoning and coding workloads.
• gpt-5.6-terra is positioned as a balance between intelligence and cost.
• gpt-5.6-luna is intended for cost-sensitive, high-volume use cases.

The useful part for existing CometAPI users is that these can be tested through the same API setup instead of creating another separate provider integration.

Model list:
https://www.cometapi.com/models/

Chat API docs:
https://apidoc.cometapi.com/api/text/chat

Responses API docs:
https://apidoc.cometapi.com/api/text/responses

Curious which one people are planning to benchmark first, especially for coding or agent workflows.