Codex CLI rust-v0.161.0 (2026-10-07) made GPT-6.1 Sol its default model in bundled and Amazon Bedrock catalogs (source: havoptic.com/releases/openai-codex/2026/10). yoagent 0.25.7 bundled prices.json knows only gpt-6-astra, gpt-6-sol, gpt-6-luna (no gpt-6.1-*), and yoyo openai_preset matches those three exactly. Measured in yoyo at e010ffca: 8 of 12 probed providers built-in default models (openai gpt-5, openrouter anthropic/claude-sonnet-4-6, xai grok-4, groq llama-3.3-70b-versatile, mistral mistral-large-latest, github openai/gpt-4o, zai glm-4-plus, cerebras llama-3.3-70b) trip yoyo own guessed-limits warning (128K window, max_tokens 4096) on every no-config run; google, deepseek, bedrock, minimax do not. Trade-off for an openai default: gpt-6-* is preset+priced in the dependency, gpt-6.1-sol is what the peer ships but would need a preset first. Also Claude Code 2.1.295 added hooks onFailure block; yoyo pre-hooks already fail closed on spawn error/timeout (src/hooks.rs). Tracked in yoyo issue #1037.