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OpenAI releases GPT-6 Sol and GPT-6 Luna reasoning models

Tue, September 22, 2026

2 mo ago

Source

Both models take text and image input and return text via the Responses and Chat Completions APIs. Up to 272K input tokens, GPT-6 Sol costs $2 input and $10 output per 1M tokens, and GPT-6 Luna $0.10 and $0.50.

Every year

Jun 24OpenAI updates chat-latest to the latest ChatGPT Instant modelopenaiAn event.5 mo agoopenaiDetails →Jul 6OpenAI releases GPT-Realtime-2.1 and GPT-Realtime-2.1 miniopenaiAn event.4 mo agoopenaiDetails →Jul 9OpenAI releases the GPT-5.6 model family: Sol, Terra and LunaopenaiAn event.4 mo agoopenaiDetails →Jul 28OpenAI releases GPT Transcribe and GPT Live TranscribeopenaiAn event.3 mo agoopenaiDetails →Jul 29OpenAI releases an official Terraform provideropenaiAn event.3 mo agoopenaiDetails →Aug 5OpenAI Fast mode supports long-context requests for GPT-5.6 modelsopenaiAn event.3 mo agoopenaiDetails →Aug 6OpenAI updates chat-latest to the newest ChatGPT modelopenaiAn event.3 mo agoopenaiDetails →Aug 13OpenAI announces Ultrafast mode for GPT-5.6 Sol in limited previewopenaiAn event.3 mo agoopenaiDetails →Aug 20OpenAI gpt-image-2 adds transparent backgrounds in previewopenaiAn event.3 mo agoopenaiDetails →Aug 20OpenAI launches a Prompt Caching dashboardopenaiAn event.3 mo agoopenaiDetails →Aug 29OpenAI API mTLS and X.509 workload identity federation are GAopenaiAn event.2 mo agoopenaiDetails →Sep 3OpenAI releases GPT-6 Astra for complex end-to-end workopenaiAn event.2 mo agoopenaiDetails →Sep 8OpenAI GPT-Rosalind is GA for approved life sciences researchopenaiAn event.2 mo agoopenaiDetails →Sep 8OpenAI Prompt Cache Diagnostics is generally available in the Responses APIopenaiAn event.2 mo agoopenaiDetails →Sep 8OpenAI releases GPT Image 2.5 Sunburst and GPT Image 2.5 FlareopenaiAn event.2 mo agoopenaiDetails →Sep 10OpenAI GPT-Live 1 is generally available for full-duplex voiceopenaiAn event.2 mo agoopenaiDetails →Sep 10Introducing the Agents APIopenaiAn event.2 mo agoopenaiDetails →Sep 10OpenAI Agents API enters public betaopenaiAn event.2 mo agoopenaiDetails →
Sep 22OpenAI releases GPT-6 Sol and GPT-6 Luna reasoning modelsopenaiAn event.2 mo agoopenai
UnverifiedSep 29Released GPT-6.1 Sol (gpt-6.1-sol) for complex coding and professional work at a lower cost than GPT-6 AstraopenaiAn event.41 days agoopenaiDetails →UnverifiedOct 6Simplified API usage tiers from five to three: Build, Launch, and GrowopenaiAn event.34 days agoopenaiDetails →UnverifiedOct 6Released the Decisions API in beta with gpt-6-lunaopenaiAn event.34 days agoopenaiDetails →UnverifiedOct 7Updated the chat-latest snapshot, which points to the latest model available in ChatGPT for Plus, ProopenaiAn event.33 days agoopenaiDetails →UnverifiedOct 16Released prompt-to-voice for all API customersopenaiAn event.24 days agoopenaiDetails →UnverifiedOct 22Build more responsive apps with the Decisions APIopenaiAn event.18 days agoopenaiDetails →UnverifiedOct 22The Decisions API is now generally available with gpt-6-lunaopenaiAn event.18 days agoopenaiDetails →UnverifiedOct 26OpenAI releases GPT-6.1 Terra modelopenaiAn event.14 days agoopenaiDetails →UnverifiedOct 30GPT-6 Rosalind released for biological researchopenaiAn event.10 days agoopenaiDetails →

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  • 2026-09-25: added to 2026-09-22