Conversation 6e539b06ad
2026-07-06T18:41:05.546+00:00
Total cost
$0.0053
Tokens in
5,743
Tokens out
1,931
includes reasoning tokens
LLM calls
3
1 · User query
What is the Prefix-FFT cache and why does it matter for decoding?
Full intermediates unavailable (run predates the web interface); step costs below.
6 · Final answer
What it is - The Prefix–FFT cache is SPECTRE’s frequency-domain analogue of the usual attention KV-cache: during prefill it stores the (non-redundant) real-FFT coefficients of the prompt (and optional
Cost breakdown
| Step | Deployment | Calls | Tokens in | Tokens out | Cost |
|---|---|---|---|---|---|
| enhance | gpt-5-mini | 1 | 190 | 682 | $0.0014 |
| rank | gpt-5-mini | 1 | 1,141 | 380 | $0.0010 |
| generate | gpt-5-mini | 1 | 4,412 | 869 | $0.0028 |