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Anthropic has released Claude Sonnet 5
On the agentic coding benchmarks:
- 63.2% on SWE-bench Pro
- 80.4% on Terminal-Bench 2.1
Zai has released GLM-5.2
extends the context window from 200K to 1M tokens and adds High/Max thinking-effort controls
scores 81.0% on Terminal-Bench 2.1 and 62.1% on SWE-bench Pro
Issue 24 is out, covering agentic coding updates from last week:
Claude Fable 5 & Mythos 5 access pulled by US government, Kimi K2.7 Code, GLM-5.2, MiMo V2.5 Pro UltraSpeed, and MiMo code
Read it in your inbox!
Anthropic has released Claude Fable 5, a new "Mythos-class" model that sits above the Opus tier
On agentic coding it scores 80.3% on SWE-bench Pro, ahead of the Mythos Preview model (77.8%), Opus 4.8 (69.2%), GPT-5.5 (58.6%), and Gemini 3.1 Pro (54.2%)
MiniMax has released M3 with 1M context window
Headline architectural change: MSA (MiniMax Sparse Attention)
Cuts per-token compute at 1M context to 1/20 of the previous gen, yielding 9× faster prefill and 15× faster decode
