GPT-6 Astra vs Claude Fable 5.1 vs Opus 5.5 for Coding: Benchmarks and Real Cost
Opus 5.5 lists at $4/$20, Astra and Fable 5.1 at $10/$50. We compare cost per completed task, sourced benchmarks, speed, context and caching.
· 15 minDesk · Labs & reverse engineering
Technical deep dives, reproducible tests, and tool evaluations.
Opus 5.5 lists at $4/$20, Astra and Fable 5.1 at $10/$50. We compare cost per completed task, sourced benchmarks, speed, context and caching.
· 15 minOpus 5.5 is now Claude Code's default on Pro. What a $20 plan's 5-hour window really covers, where it runs dry, and when Max 5x or 20x pays off.
· 15 minEvery ChatGPT plan's Codex allowance in one table: GPT-6 Astra, Sol and Luna messages per five hours, GPT-6 Pro weekly caps, resets and what to do at the limit.
· 17 minGPT-6 Sol and Luna halve OpenAI's API prices yet score near rival flagships on coding, while flagship Astra is OpenAI's first Critical-rated cyber model.
· 8 minAlibaba confirmed Qwen 4 is in training at Apsara 2026, with Qwen 4.5 and Qwen 5 targeting 5-10T parameters and the Zhenwu V900 chip due Q1 2027.
· 6 minXiaomi's MiMo-V2.6 clears CyberGym at 94.0 under an MIT licence, but ExploitBench at 47.9 shows the audit-to-exploit gap is still wide open.
· 7 minIn agentic workflows, prefill latency and prefix caching matter more than raw tok/s. We benchmark SGLang RadixAttention vs vLLM PagedAttention and APC.
· 10 minChoosing a $6,000 local AI workstation: Apple Silicon Unified Memory (128GB-256GB) vs Dual RTX 5090 (64GB). Sizing 70B/236B MoE models, TTFT, and TCO.
· 9 min