AI Model Changelog

ChatGPT and API update improved GPT-5.5 Instant style and removed Canvas from GPT-5.5 Instant and Thinking

Updated in ChatGPT and the API for more natural, better-paced responses with fewer overly long or bullet-heavy answers

OpenAI announced that o3 will be retired from ChatGPT on August 26, 2026 after a 90-day sunset period

Claude Opus 4.8 released as Anthropic's latest high-capability model with a 1M context window

Pricing remains $5.00 per 1M input tokens and $25.00 per 1M output tokens

DeepSeek scheduled deepseek-chat and deepseek-reasoner compatibility aliases for retirement on June 15, 2026

Gemini 3.5 Flash released for Gemini API and Vertex AI with updated multimodal and reasoning performance

API pricing listed at $1.50 per 1M input tokens and $9.00 per 1M output tokens

GPT-5.5 Instant rolled out as ChatGPT's default model for all users and as chat-latest in the API, replacing GPT-5.3 Instant

Mistral Medium 3.5 released as the latest Medium family model with 262K context

Pricing set at $1.50 per 1M input tokens and $7.50 per 1M output tokens

GPT-5.5 became available in the API with a 1M context window

API pricing set at $5.00 per 1M input tokens and $30.00 per 1M output tokens

GPT-5.5 Pro became available in the API for higher-accuracy work

API pricing set at $30.00 per 1M input tokens and $180.00 per 1M output tokens

DeepSeek V4 Pro released for API access with stronger reasoning, coding, and tool-use performance

Promotional API pricing listed at $0.50 per 1M input tokens and $1.50 per 1M output tokens

DeepSeek V4 Flash released alongside V4 Pro for faster and lower-cost API workloads

Pricing set at $0.14 per 1M input tokens and $0.28 per 1M output tokens

GPT-5.5 introduced for ChatGPT and Codex as OpenAI's frontier model for complex professional work

GPT-5.5 Pro introduced as the high-compute GPT-5.5 mode for harder questions and higher-accuracy work

Gemini Embedding 2 made generally available for text embedding workloads

Meta confirmed Llama 4 Behemoth was still in training, leaving Maverick and Scout as the current released Llama 4 models

Claude Opus 4.7 released with a 1M context window, stronger tool use, and improved agentic coding performance

Pricing set at $5.00 per 1M input tokens and $25.00 per 1M output tokens

Claude Mythos Preview introduced as a gated research preview through Anthropic's Project Glasswing security initiative

Preview participant pricing listed at $25.00 per 1M input tokens and $125.00 per 1M output tokens after included usage credits

Voxtral TTS released for speech generation and voice output use cases

Gemini 3.1 Flash Live introduced for realtime audio and multimodal sessions

Leanstral released for formal mathematics and Lean-assisted reasoning tasks