1m-context AI
3 picks we've reviewed.
paid · Proprietary (closed, hosted only) · 1M tokens in4w ago
model general LLM
Claude Sonnet 5
Anthropic's Sonnet-tier model — 'the best combination of speed and intelligence.' Near-frontier on coding and agentic work at roughly a third of Opus's price, with a 1M-token context and adaptive thinking on by default.
Anthropic
open-source · MIT · 1M tokens in1mo ago
model coding
GLM-5.2
Zhipu's open-weight coding flagship: a 753B mixture-of-experts model with a 1M-token context and MIT weights, claiming to edge past GPT-5.5 on coding benchmarks.
Zhipu AI (Z.ai)
paid · Proprietary (closed, hosted only) · 1M tokens in2mo ago
model frontier LLM
Claude Opus 4.8
Anthropic's most capable Opus-tier model, built for complex agentic coding and enterprise work — a 1M-token context, adaptive thinking, and 128K max output, hosted only via the Claude API.
Anthropic