Nous Research says OpenAI GPT-6 Astra is available on Nous Portal with 20% off at signup. Another third-party inference portal path to try Astra for agent and coding workflows beyond OpenAI’s first-party surfaces.
Artificial Analysis rated GPT-6 Astra: Coding Agent Index 67 in Codex, roughly matching Claude Opus 5 / Fable 5 in Claude Code and Muse Spark 1.3 in Muse Code, with ~70% better token efficiency vs GPT-5.6 Sol (max). List price rises to $10/$50 per 1M in/out (2.5× Sol), yet per-task cost stays well below Fable 5. Intelligence Index stays 61, tied with Sol.
Arena.ai (@arena) says Google DeepMind’s Gemini 3.8 Flash (High) put Gemini on the Agent Arena Pareto frontier for the first time: $0.75/$3.75 per MTok, ~$0.22 median cost per Agent Arena task with +5.94% net gain—on par with Grok 4.5 and GLM 5.2 (Max) at roughly 44–50% lower price.
OpenRouter also announces Muse Spark 1.3 Contributor is live as the cost-efficient tier for experimentation, learning, and early agentic/coding workflows. Listed around $0.10 in / $0.20 out per 1M tokens (vs ~$1.25/$4.25 on the standard tier); prompts and outputs may be used to improve Meta products.
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