Summary

Hermes Agent incorrectly reports kimi-k2.6 as having a 32,768 token
context window, blocking agent initialization with:

ValueError: Model kimi-k2.6 has a context window of 32,768 tokens,
which is below the minimum 64,000 required by Hermes Agent.

The model actually supports 256K context. The bug is in the resolution
order in agent/model_metadata.py.

Root Cause

get_model_context_length() consults OpenRouter's API metadata before
checking hardcoded defaults. OpenRouter incorrectly reports 32,768 for
the kimi-k2.6 family. Since OpenRouter "succeeds", the correct hardcoded
value of 262,144 is never reached.

Affected Models (verified via OpenRouter API)

Unaffected (OpenRouter correct)

• kimi-k2.5 — reports 262,144 ✓
• kimi-k2-thinking — reports 262,144 ✓
• kimi-k2-0905 — reports 262,144 ✓

Proposed Fix

Add explicit entries to DEFAULT_CONTEXT_LENGTHS in
agent/model_metadata.py:

"kimi-k2.6": 262144,
"kimi-k2.6-20260420": 262144,
"kimi-latest": 262144,

Workaround

Add context_length: 131072 under both model: and
auxiliary.compression: in config.yaml.

Environment

• Hermes Agent v0.13.0 (2026.5.7)
• Provider: kimi-coding
• Model: kimi-k2.6