All Changes
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New LaunchMajor
Sep 30, 2026 (UTC)OpenAI
openai-gpt-image-2
New gpt-image-2.5 image models added to OpenAI pricing
Impact
Cost Impact: HighMigration: Recommended3/5
New LaunchMajor
Sep 22, 2026 (UTC)OpenAI
openai-gpt-6-astraGPT-6 Sol and Luna replace GPT-5.6 lineup with lower pricing
Impact
Cost Impact: HighMigration: Recommended4/5
New LaunchMajor
Sep 21, 2026 (UTC)OpenAI
openai-gpt-4.1OpenAI adds new model pricing tiers and tool billing details
Impact
Cost Impact: High4/5
New LaunchMajor
Sep 11, 2026 (UTC)OpenAI
openai-gpt-6-astraOpenAI adds gpt-rosalind-research model with new pricing tiers
Impact
Cost Impact: High3/5
New LaunchMajor
Sep 8, 2026 (UTC)OpenAI
openai-gpt-image-2OpenAI replaces gpt-image-2 with gpt-image-2.5 variants at same price
Impact
Migration: Required4/5
New LaunchImportant
Sep 3, 2026 (UTC)OpenAI
gpt-6-astraOpenAI launches GPT-6 Astra with new pricing tiers
Impact
Cost Impact: HighMigration: Required5/5
New LaunchImportant
Jul 9, 2026 (UTC)OpenAI
gpt-5.6-solOpenAI launched GPT-5.6 Sol, Terra, and Luna
Impact
Cost Impact: HighMigration: RecommendedVerified5/5
New LaunchImportant
Apr 23, 2026 (UTC)OpenAI
gpt-5.5OpenAI introduced GPT-5.5 for ChatGPT, Codex, and upcoming API access
Impact
Cost Impact: HighMigration: RecommendedVerified5/5
New LaunchMajor
Mar 26, 2026 (UTC)OpenAI
responses-apiOpenAI Adds Hooks and Plugins
Impact
Migration: Recommended2/5
New LaunchMajor
Mar 17, 2026 (UTC)OpenAI
gpt-5New GPT-5.4 Models Released
Impact
Cost Impact: LowMigration: Recommended3/5
New LaunchMajor
Mar 17, 2026 (UTC)OpenAI
gpt-5.4-miniOpenAI launched GPT-5.4 mini and nano for faster high-volume workloads
Impact
Cost Impact: HighVerified4/5
New LaunchMajor
Mar 5, 2026 (UTC)OpenAI
gpt-5.4OpenAI introduced GPT-5.4 across ChatGPT, Codex, and API
Impact
Cost Impact: HighMigration: RecommendedVerified5/5
New LaunchMajor
Mar 3, 2026 (UTC)OpenAI
gpt-5GPT-5.3 Chat Latest Model Released
Impact
2/5
New LaunchMajor
Feb 25, 2026 (UTC)OpenAI
responses-apiOpenAI API Update: Response Phase Released
Impact
Migration: Recommended2/5
New LaunchMajor
Feb 24, 2026 (UTC)OpenAI
gpt-5GPT-5.3 Codex Released
Impact
Migration: Recommended3/5
New LaunchMajor
Feb 23, 2026 (UTC)OpenAI
realtime-apiOpenAI Adds WebSocket Mode
Impact
Migration: Recommended2/5
New LaunchMajor
Feb 23, 2026 (UTC)OpenAI
gpt-realtimeNew Models Released: gpt-realtime-1.5 and gpt-audio-1.5
Impact
Migration: Recommended3/5
New LaunchMajor
Feb 18, 2026 (UTC)OpenAI
responses-apiOpenAI Adds Multi-agents
Impact
Migration: Recommended3/5
New LaunchMajor
Feb 6, 2026 (UTC)OpenAI
gpt-5-3-codexGPT-5.3 Codex introduced (new model for coding workflows)
Impact
Verified4/5
New LaunchMajor
Feb 6, 2026 (UTC)OpenAI
openai-frontierOpenAI Frontier introduced (new product)
Impact
Verified3/5