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Anthropic

Claude Haiku 5.5

anthropic/claude-haiku-5.5

about 0.03¢ a message

A typical message: about 500 tokens you send and 500 it writes.

$0.11 per 1M tokens you send$0.55 per 1M tokens it writesreads 1M tokens at once

Published capabilitiesreads imagestool callingjson schema
Chat with Claude Haiku 5.5Call it from codeLock this price

About

Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding, computer use, and...

In Anthropic's words.

Try it here

Whatever it says appears here.

Published facts

What the upstream's catalog says about this world, with its price as billed here.

Context window
1,000,000 tokens
Longest answer
128,000 tokens
Input, per 1M tokens
$0.11upstream $0.10
Output, per 1M tokens
$0.55upstream $0.50
Cached input, per 1M
$0.011upstream $0.01
Cache write, per 1M
$0.1375upstream $0.125
Margin
+10%
Reads
text and images
First listed
2026-10-07

Price and latency history as JSON: GET /api/planet/history?id=anthropic/claude-haiku-5.5.

Measured here

1243ms
first word, median
1243ms
first word, slow
534.2 tok/s
speed
0.0%
errors

From 1 request through this deployment in the last 7 days. Not a benchmark, just what this ship saw.

Latency

first token p50 whole answer p50 not enough data
2026-09-19: nothing measured2026-09-20: nothing measured2026-09-21: nothing measured2026-09-22: nothing measured2026-09-23: nothing measured2026-09-24: nothing measured2026-09-25: nothing measured2026-09-26: nothing measured2026-09-27: nothing measured2026-09-28: nothing measured2026-09-29: nothing measured2026-09-30: nothing measured2026-10-01: nothing measured2026-10-02: nothing measured2026-10-03: nothing measured2026-10-04: nothing measured2026-10-05: nothing measured2026-10-06: nothing measured2026-10-07: nothing measured2026-10-08: nothing measured2026-10-09: nothing measured2026-10-10: nothing measured2026-10-11: nothing measured2026-10-12: nothing measured2026-10-13: nothing measured2026-10-14: nothing measured2026-10-15: nothing measured2026-10-16: nothing measured2026-10-17: nothing measured2026-10-18: 1 sample, not enough data (5 needed)
2026-09-192026-10-18
Median first token and whole answer per UTC day, from requests through this gateway and the scheduled probe. 0 of 30 days had the 5 samples a median needs here. A thinner day is shown as not enough data rather than as a number.
Daily latency, UTC
DaySamplesSucceededFirst token p50Whole answer p50
2026-10-181not enough data

Call it

One OpenAI compatible endpoint, this model's id, and an am_live_ key from the dashboard. Or try it in chat first, no key needed.

curl https://useantimatter.com/v1/chat/completions \
  -H "Authorization: Bearer $ANTIMATTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "anthropic/claude-haiku-5.5", "messages": [{"role": "user", "content": "Hello"}]}'

Everything else is in the docs.

Embed this

A badge with this world's live price per million tokens, as billed here, for a README or a site. It links back to this page.

Claude Haiku 5.5 price on Antimatter
<a href="https://useantimatter.com/planet/anthropic/claude-haiku-5.5"><img src="https://useantimatter.com/api/badge/price?id=anthropic%2Fclaude-haiku-5.5" alt="Claude Haiku 5.5 price on Antimatter" height="28"></a>

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