OpenAI shipped GPT-5.6 as a three-tier family—and attached the biggest claims to efficiency.
Sol, Terra, and Luna are generally available with new max and multi-agent settings, but the launch evidence is still dominated by OpenAI's own evaluations.
Verified 5:31 AM PDT · 1 original sources
OpenAI made GPT-5.6 Sol, Terra, and Luna generally available on July 9. It priced the models at $5/$30, $2.50/$15, and $1/$6 per million input/output tokens respectively, and added higher-compute max and multi-agent ultra modes for demanding work.
Performance, safety, and cost comparisons are company claims from an interested primary source. Benchmark leadership does not establish reliability or economic advantage in a buyer's own workflow.
The release turns the frontier-model contest into a portfolio and unit-economics contest. If smaller tiers deliver near-frontier work at materially lower cost, buyers can move more agentic workloads from experiments into routine operations.
Independent reproductions of coding, browser, cyber, science, latency, and total-cost results; real error rates on long-running work; and whether multi-agent gains survive outside curated tasks.
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