{"data":{"id":"d4986b36-2375-446e-b642-2c48406ba869","title":"Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war","summary":"Multiple AI companies released new models on September 22, 2026: Anthropic released Claude Opus 5.5, and OpenAI released GPT-6 Sol and GPT-6 Luna, with GPT-6 Luna priced at half the cost of its GPT-5.6 predecessor, triggering competitive pricing across the AI model market. Claude Opus 5.5 received a 20% price reduction and improved communication style, though it experienced a failure when set to maximum reasoning level on an SVG generation test. The price reductions have intensified competition, particularly affecting lower-tier models like Haiku, which now faces pricing pressure from GPT-6 Luna.","solution":"N/A -- no mitigation discussed in source.","labels":["industry"],"sourceUrl":"https://simonwillison.net/2026/Sep/22/opus-and-sol-and-luna/","publishedAt":"2026-09-22T23:46:41.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"news","affectedPackages":null,"affectedVendors":["OpenAI","Anthropic"],"affectedVendorsRaw":["OpenAI","Anthropic","GPT-6 Sol","GPT-6 Luna","GPT-5.6 Luna","Claude Opus 5.5","Grok 4.7","Claude Fable 5.1"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"patchAvailable":null,"disclosureDate":"2026-09-22T23:46:41.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"trivial","impactType":null,"aiComponentTargeted":null,"llmSpecific":true,"classifierConfidence":0.95,"researchCategory":null,"atlasIds":null}}