Why did my Heavy request cost much more than Flash?

Two effects multiply:

1. Higher price per token: Heavy output is $4.40 per 1M vs Flash's $3.40.
2. More tokens: Heavy reasons before answering and writes longer answers. In Benchmark 2, median output per task was 204 tokens on Heavy vs 57 on Flash.

That's why cost per 1,000 benchmark tasks was $3.64 on Heavy vs $1.64 on Flash, more than double, even though the per-token price is only about 30% higher.

Good to know#

• A request whose prompt is over 262K tokens bills its whole input at 1.5×; output prices don't change. Long-context pricing
• Every tier shares the same 1M-token context window (1,048,576 tokens). Context window
• Line Code was retired on Nov 1, 2026; its ids answer 410 model_retired. Line Code retirement

Still need help?#

• General support: support@clatterlabs.com or team@clatterlabs.xyz
• Infrastructure questions, or permanent deletion of your data (your whole account or one service): infrastructure@clatterlabs.xyz

We usually reply within the first hour, and always within 24 hours. A full support team is with you.