Pricing Analysis

What it costs as the conversation grows

*Costs vary with use case and volume. Every model here is priced as published, with no memory of its own.

Five ways of asking the same question, priced against the shelf. The document is the context in every one of them: we ingest it once and are never sent it again, while a frontier model is handed it - and the whole transcript - on every turn. Assumptions are stated under the grid.

The document

208 pages

140,000 tokens

System prompt

1,000 tokens

sent every turn

Each message

20 tokens in

150 tokens out

A conversation

12 turns

scenarios 02 and 03

A month

10 messages a day

over 30 days

01

One person, one message

No caching
$2$1.5$1$0.5$0$0.003192SapientPriors$0.0216.7× SPDeepSeekV4.1 Flash$0.0288.9× SPGPT-5.6 Luna$0.14244× SPClaudeHaiku 4.5$0.28489× SPClaudeSonnet 5$0.28489× SPGPT-5.6Terra$0.709222× SPClaudeOpus 5$0.710222× SPGPT-5.6 Sol$1.42444× SPFable 5.1$1.42444× SPGPT-6 Astra

We are never sent the document. Every model here is sent all of it, to answer one question. The cheapest of them, DeepSeek V4.1 Flash, costs 6.7× ours.

02

One person, one conversation

No caching
SapientPriors $0.038
Claude Haiku 4.5 $1.71
Claude Opus 5 $8.56
$10$7.5$5$2.5$0$2.83$4.96$7.09$8.521471012MESSAGES

Each message re-sends the document and the transcript. We are sent neither, so our line is flat. After 12 messages: $8.56 for Opus 5, $1.71 for Haiku 4.5, $0.038 for us.

03

One person, one conversation

Prompt cache warm
SapientPriors $0.038
Claude Haiku 4.5 $0.352
Claude Opus 5 $1.76
$10$7.5$5$2.5$0$1.10$1.33$1.56$1.721471012MESSAGES

The cache holds the document for five minutes at a tenth of the price. It saves $6.80 on Opus. The line still climbs, because the cache cannot hold the transcript: $1.76 against $0.038, 46× the cost.

04

A month of support, 10 messages a day each

No caching
SapientPriors $958
Claude Haiku 4.5 $50,156
Claude Opus 5 $250,778
$300,000$225,000$150,000$75,000$0$74,773$158,047$249,8201102030DAYS
people

The curves bend because the transcript grows and is re-sent every turn. Ours is straight. Change the crowd size: the axis grows, the gap does not.

05

A month of support, 10 messages a day each

Prompt cache warm
SapientPriors $958
Claude Haiku 4.5 $16,950
Claude Opus 5 $84,750
$300,000$225,000$150,000$75,000$0$19,431$47,362$83,7921102030DAYS
people

The cache saves real money and the curves still bend. It is cold again every morning, so every person pays to fill it once a day. The transcript it cannot hold is the part that grows.

Talk to us

For detailed API endpoint pricing, talk to us.

The grid above prices a conversation. Pricing an integration means your endpoints, your volumes and your retention, so we would rather work it out against your numbers than publish one we would have to walk back.

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