{"slug":"llm-model-retirement-calendar-2026","title":"LLM model retirement calendar, 2026","asOf":"2026-10-26","columns":["model","provider","retires","announced","days_left","replacement","replacement_blended_price_delta_pct"],"rows":[["gpt-4.1-nano","openai","2026-10-23","2026-04-22",0,"gpt-5.6-luna",137.5],["o1","openai","2026-10-23","2026-04-22",0,"gpt-5.6-sol",-70.83],["o3-mini","openai","2026-10-23","2026-04-22",0,"gpt-5.6-sol",297.73],["o4-mini","openai","2026-10-23","2026-04-22",0,"gpt-5.6-terra",115.91],["claude-sonnet-4-5","anthropic","2026-11-30","2026-09-30",35,"claude-sonnet-5-5",-33.33],["gpt-5","openai","2026-12-11","2026-06-11",46,"gpt-5.6-sol",154.55],["gpt-5-mini","openai","2026-12-11","2026-06-11",46,"gpt-5.6-terra",590.91],["gpt-5-nano","openai","2026-12-11","2026-06-11",46,"gpt-5.6-luna",245.45],["gpt-5-pro","openai","2026-12-11","2026-06-11",46,"gpt-5.6-sol",-78.79],["o3","openai","2026-12-11","2026-06-11",46,"gpt-5.6-sol",118.75],["o3-pro","openai","2026-12-11","2026-06-11",46,"gpt-5.6-sol",-78.12],["gpt-4o","openai","2027-01-14","2026-10-14",80,"gpt-6-luna",-95.62],["gpt-4o-mini","openai","2027-01-14","2026-10-14",80,"gpt-6-luna",-27.08],["gpt-4.1","openai","2027-01-14","2026-10-14",80,"gpt-6-luna",-94.53],["gpt-4.1-mini","openai","2027-01-14","2026-10-14",80,"gpt-6-luna",-72.66],["gpt-5.1","openai","2027-04-01","2026-10-01",157,"gpt-6-sol",27.27],["gpt-5.4-nano","openai","2027-04-01","2026-10-01",157,"gpt-6-luna",-54.84]],"summary":{"models_with_dates":17,"already_retired":4,"retiring_within_90_days":11,"next_retirement":"claude-sonnet-4-5","median_replacement_price_delta_pct":-27.08},"generated_at":"2026-10-26T20:32:25.492Z","license":"CC-BY-4.0","canonical":"https://tokenzero.sh/reports/llm-model-retirement-calendar-2026"}