AI Model Changelog

GPT-5.5 introduced for ChatGPT, Codex, and upcoming API access with 1M context

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

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

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

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

DeepSeek V4 Pro Preview made available for early API evaluation

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

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

Rolled out in ChatGPT as Thinking access for Free and Go users and as a fallback for GPT-5.4 Thinking limits

Gemini 3.1 Flash-Lite released for cost-sensitive, low-latency Gemini workloads

Mistral Small 4 released as the latest cost-efficient Small family model with 256K context

Pricing set at $0.15 per 1M input tokens and $0.45 per 1M output tokens

GPT-5.4 Mini released in the API, Codex, and ChatGPT with 400K context

API pricing set at $0.75 per 1M input tokens and $4.50 per 1M output tokens

GPT-5.4 Nano released for latency-sensitive and high-volume workloads in the API

API pricing set at $0.20 per 1M input tokens and $1.25 per 1M output tokens

API pricing set at $3.00 per 1M input tokens and $12.00 per 1M output tokens

Claude Opus 4.6 launched with improved reasoning and coding

Claude Sonnet 4.6 released alongside Opus 4.6

Gemini 3.1 Pro released with 2M context and enhanced reasoning

Initial release of GPT-5.4 with 1M context window

DeepSeek V3.2 released with improved reasoning and efficiency

Improved instruction following and reduced hallucination rate