context window

xAI has made Grok 4.3 generally available on Amazon Bedrock, marking xAI's debut as a Bedrock model provider. The multimodal model offers a 1 million token context window, configurable reasoning effort (none/low/medium/high), and runs on Bedrock's Mantle inference engine using OpenAI-compatible APIs.

OpenAI has released GPT-5.6 Terra, a mid-tier model in its GPT-5.6 series priced at $2.50 per million input tokens and $15 per million output tokens. The model features a 1 million token context window and February 2026 knowledge cutoff, positioned between the flagship Sol and cost-efficient Luna tiers.

OpenAI has updated GPT-5.5 Instant, ChatGPT's default model since May, to better track context across conversations and adapt when users clarify or modify questions. The update also adds location-aware recommendations and improved handling of complex multi-part queries.

Alibaba has released Qwen3.7 Max, the flagship model in its Qwen3.7 series, featuring a 1 million token context window. The text-only model is designed for agent-centric workloads with strengths in coding, office productivity, and long-horizon autonomous execution, and includes explicit prompt caching support.

Google released Gemini Flash Latest on April 27, 2026, a dynamic router that automatically redirects to the newest model in the Gemini Flash family. The model supports 1,048,576 token context window and includes reasoning capabilities.

OpenAI released GPT-5.5 on April 23, 2026, seven weeks after GPT-5.4. The model features a 400K context window in Codex and claims improvements in multi-step tasks, agentic coding, and computer use, though at higher pricing than its predecessor.

Xiaomi released MiMo-V2.5-Pro on April 22, 2026, its flagship model featuring a 1,048,576 token context window and pricing at $1 per million input tokens and $3 per million output tokens. According to Xiaomi, the model ranks highly on ClawEval, GDPVal, and SWE-bench Pro benchmarks, designed for autonomous completion of professional tasks requiring thousands of tool calls.