Guides
Context windows are ceilings, not free capacity
More context can help, but it also increases latency, cost, and the amount an agent must search.
A concise editorial guide, not a universal recommendation or guarantee.
Decision rule
Treat the advertised limit as an eligibility gate. Keep instructions and retrieved files focused, measure token growth, and verify that the provider applies no lower effective limit or pricing tier. A one-million-token window does not prove better reasoning.
Practical checklist
- Start with the smallest context that fits.
- Measure token growth in real sessions.
Sources checked
These first-party or authoritative sources ground the note. Checked 2026-08-16.