OpenRouter Listings Surface for Three Unannounced OpenAI Models: GPT-6 Sol Pro, Luna, and Luna Pro

Three Unverified OpenAI Listings Appear on OpenRouter

Three model pages referencing OpenAI—labeled GPT-6 Sol Pro, GPT-6 Luna, and GPT-6 Luna Pro—appeared on OpenRouter, the third-party API aggregation platform, according to page titles indexed from openrouter.ai. As of this writing, none of these names have been confirmed by OpenAI through an official blog post, API changelog, or developer documentation.

No specifications accompany any of the three listings in the material reviewed. There is no disclosed context window size, no input or output pricing per million tokens, no benchmark scores, no parameter count, and no training data cutoff date for any of the three names. OpenRouter frequently lists models from multiple providers, including previews, fine-tunes, and community-routed variants, and listings on the platform do not by themselves constitute a verified vendor release.

What's Actually Known

The only confirmed facts here are the existence of three distinct URL slugs on OpenRouter's model directory: openai/gpt-6-sol-pro, openai/gpt-6-luna, and openai/gpt-6-luna-pro. The naming pattern breaks from OpenAI's established public conventions (GPT-4, GPT-4o, GPT-4.1, o1, o3), which have not previously used celestial-body codenames like "Sol" or "Luna" for shipped products. OpenAI has used internal or leaked codenames in the past that later diverged from final public names, so codename speculation alone should not be treated as confirmation of a GPT-6 launch, its capabilities, or its release timeline.

OpenAI has not published a GPT-6 system card, safety evaluation, or announcement post as of this article. No independent benchmark results—on MMLU, GPQA, SWE-bench, or any other standard suite—have been reported for any of the three names by OpenAI or third-party evaluators.

Why This Matters for Verification

Aggregator platforms like OpenRouter route requests to models hosted by many providers, and listings can appear before, during, or independent of a formal vendor announcement—sometimes reflecting staged rollouts, sometimes reflecting placeholder or test entries. Until OpenAI itself confirms specifications through official channels, the existence of these page titles should be treated as an unverified signal, not a product release.

What This Means

Treat "GPT-6 Sol Pro," "GPT-6 Luna," and "GPT-6 Luna Pro" as unconfirmed at this stage. No pricing, context window, or benchmark data exists to evaluate these models against competitors like Gemini 2.5 Pro or Claude Opus 4. If OpenAI confirms a GPT-6 family launch with accompanying documentation, expect a system card, benchmark disclosures, and API pricing to follow—typically within the same announcement window. Until then, readers should treat these names as directory entries pending verification, not as evidence of a shipped model generation.