pi-synthetic: v0.19.0

Minor Changes

• 181230b: Add GLM-5.2 model and update syn:large:text alias

  • Add hf:zai-org/GLM-5.2:
    • contextWindow: 524288
    • maxTokens: 65536
    • cost: input $1.4, output $4.4 per 1M tokens (cacheRead $1.4)
    • input: text only
    • reasoning: two effective levels — max (default, highest) and high (lower), per the GLM-5.2 chat template. The Synthetic OpenAI shim rejects literal max (and xhigh errors), so thinkingLevelMap maps Pi’s high -> "high" and xhigh -> "medium" (which falls through to max); minimal/low/medium are hidden.
  • Update syn:large:text alias target from hf:zai-org/GLM-5.1 to hf:zai-org/GLM-5.2. Alias inherits the new two-level thinking map from its target.