AnthropicCertifiedReleased 10/07/2026

Claude Haiku 5.5

Claude Haiku 5.5 brings adaptive reasoning to Anthropic’s low-cost Haiku family for everyday tasks, tool use, and scaled sub-agent deployments. It is the first Haiku with adjustable effort levels, letting developers balance reasoning depth and token usage for each task, with the option to turn thinking off for simpler requests.

View API reference ↓
Input / output priceFrom$0.100 / $0.50per 1M
24h uptime100.00%
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.inferencebureau.com/v1",
  apiKey: process.env.IB_API_KEY,
});

const res = await client.chat.completions.create({
  model: "anthropic/claude-haiku-5.5",
  messages: [{ role: "user", content: "Why is the sky blue?" }],
});

console.log(res.choices[0].message.content);

Providers

Dispatch routes requests across these providers and fails over between them without changing the model. Restrict or order providers with team Directives. Prices are gateway list prices before the platform fee.

ProviderContextMax outputLatencyThroughputInputOutputCacheCapabilitiesZDRNo trainingRegionsStatus
Amazon Bedrock1M64K0.8 s221 tps$0.100$0.50Read $0.010Write $0.137 featuresYesYesUS EU AU JPCertified
Anthropic1M128K0.9 s214 tps$0.100$0.50Read $0.010Write $0.137 featuresYesYesUSCertified
Claude Platform on AWS1M128K1.2 s209 tps$0.100$0.50Read $0.010Write $0.137 featuresYesYesGlobalCertified
Google Vertex AI1M128K0.5 s216 tps$0.100$0.50Read $0.010Write $0.137 featuresYesYesUS EUCertified

Uptime

24 hours

Request success rate per provider.

Amazon Bedrock100.00%
Anthropic100.00%
Claude Platform on AWS100.00%
Google Vertex AI100.00%

Throughput

last hour

P50 output tokens per second.

Amazon Bedrock221 tps
Google Vertex AI216 tps
Anthropic214 tps
Claude Platform on AWS209 tps

Latency

last hour

P50 time to first token.

Google Vertex AI0.5 s
Amazon Bedrock0.8 s
Anthropic0.9 s
Claude Platform on AWS1.2 s

Getting started

Create a key on the API Keys page and set it as IB_API_KEY. See the quickstart.

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.inferencebureau.com/v1",
  apiKey: process.env.IB_API_KEY,
});

const res = await client.chat.completions.create({
  model: "anthropic/claude-haiku-5.5",
  messages: [{ role: "user", content: "Why is the sky blue?" }],
});

console.log(res.choices[0].message.content);

Top-level parameters

Standard Chat Completions parameters work as documented. These have model-specific behavior.

ParameterTypeRequiredDescription
modelstringYesModel ID in the form creator/model, e.g. anthropic/claude-haiku-5.5. Must be allowed by your team's Directives.
max_tokensnumberNoHard cap on generated tokens, and the basis for the balance reserved per request. Claude Haiku 5.5 supports up to 128,000 output tokens.
reasoning{ effort: 'low' | 'medium' | 'high' }NoReasoning effort, mapped to the provider's native configuration. Reasoning tokens count toward output usage.
toolsTool[]NoFunction definitions the model can call. Tool calls are returned in choices[].message.tool_calls.
Supportedmax_tokensstoptoolstool_choicereasoninginclude_reasoningresponse_formatstructured_outputs

Input limits

InputSourcesLimits
Text—Prompt and response share the 1M-token context window
ImageURL, base64Sent as image_url content parts; counts as input tokens
PDFURL, base64Sent as file content parts; counts as input tokens

More models by Anthropic

ModelContextInputOutputCacheRelease
anthropic/claude-haiku-5.5-batch1M$0.050$0.25Read $0.0050Write $0.06310/07/2026
anthropic/claude-sonnet-5.51M$2.00$10.00Read $0.100Write $2.5009/28/2026
anthropic/claude-sonnet-5.5-batch1M$1.00$5.00Read $0.050Write $1.2509/28/2026
anthropic/claude-opus-5.51M$4.00$20.00Read $0.20Write $5.0009/22/2026
anthropic/claude-opus-5.5-batch1M$2.00$10.00Read $0.100Write $2.5009/22/2026
anthropic/claude-opus-5.5-fast1M$8.00$40.00Read $0.40Write $10.0009/22/2026
anthropic/claude-fable-5.11M$10.00$50.00Read $0.25Write $12.5008/31/2026
anthropic/claude-fable-5.1-batch1M$5.00$25.00Read $0.13Write $6.2508/31/2026
anthropic/claude-opus-51M$5.00$25.00Read $0.50Write $6.2507/24/2026
anthropic/claude-opus-5-batch1M$2.50$12.50Read $0.25Write $3.1307/24/2026