Claude Opus 4.6 supports 1M context window via explicit model flag
September 12, 2026
Users report Claude Opus 4.6 functions with a 1M token context window when accessed via the /model claude-opus-4-6[1m] command. Preliminary observations suggest the model shares personality traits with the Fable model but with less refined character maturity.
HOW THIS AFFECTS YOU
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builderYou can test extended context capabilities using this specific model flag for high-token applications.