models

Anthropic: Claude Haiku 4.5 (batch)

Markdown · JSON

Anthropic: Claude Haiku 4.5 (batch)

Claude Haiku 4.5 is designed for interactive assistants, user support, everyday information processing and work on code. Supports a separate reasoning mode for complex questions.

About the model

This description covers the model’s capabilities. Available in Ailoot inputs, outputs and options are listed for the selected method below.

When a response to every step matters

Anthropic designed Claude Haiku 4.5 for conversational assistants, user service, collaborative coding and prototyping. The model is useful in a cycle where a person asks a question, receives a result and immediately clarifies the next step. According to Anthropic, this version is characterized by low response latency; the actual time depends on the task and application.

Haiku 4.5 is also intended to process large numbers of separate tasks. In an agentic workflow, it can be assigned a specific subtask and its result then passed to the rest of the system. Described uses include coding, reasoning and interface actions. Tool calls and computer control are possible when the application provides the model with the appropriate tools; a single text request does not give it access to a working environment.

Ordinary answers and a manual reasoning budget

For tasks with multiple logical steps, extended thinking is provided: the application explicitly enables reasoning and sets its budget through budget_tokens. When the method supports these settings, the manual budget_tokens budget must be at least 1024 tokens and less than max_tokens to leave room for the final answer. It guides the amount of analysis, while max_tokens limits all output. Haiku 4.5 uses this manual mode specifically: adaptive reasoning and depth control through effort are not supported for this version. Reasoning between successive tool calls is also not supported.

This distinction is useful when choosing a task. Ordinary mode is suited to direct conversation; enabling reasoning gives the model room to work through code or a complex question. The task's content still determines what information needs to be analyzed and how the result should be presented.

Material and version boundaries

The model accepts text and images and returns text. The context window is 200 thousand tokens, and the maximum response is 64 thousand tokens. An image serves as material for analysis alongside the question: the model can explain visible content and connect it to the text prompt. Image input support does not mean that images can be created or edited.

The manufacturer's standard visual input formats are JPEG/PNG/GIF/WebP, using the first frame of an animation. For native analysis, the longer dimension is 1568 pixels, with 1568 visual tokens; larger images are downscaled before analysis. File and parameter support depends on the application's method.

For this version, Anthropic describes a concise, direct conversational style. It is useful to specify the desired level of detail, result format and task constraints beforehand. The reliable built-in knowledge cutoff is February 2025; information about later events must be supplied in the task material or obtained through tools available to the application. Some requests may be declined.

If the method provides sampling settings, temperature and top_p cannot both be set: one of these parameters is selected for this version.

Ailoot Ultra · Batch POST /v1/batches anthropic/claude-haiku-4.5:batch

anthropic/claude-haiku-4.5:batch

Anthropic /anthropic/claude-haiku-4.5:batch

Overview

Claude Haiku 4.5 is designed for interactive assistants, user support, everyday information processing and work on code. Supports a separate reasoning mode for complex questions.

Accepted inputs
Text
Results
Text

Available in Ailoot · inputs & methods

Ailoot Ultra · Batch POST /v1/batches
Input types
text
Output types
text
Output format
inline results[].response.body JSON
FieldTypeRequirementValues & limitsDefault
FieldendpointTypestringRequirementRequiredValues & limits
/v1/chat/completions
Default—
FieldmodelTypestringRequirementRequiredValues & limits
anthropic/claude-haiku-4.5:batch
Default—
FieldrequestsTypebatch_item[]RequirementRequiredValues & limits
Minimum items: 1
Default—
Fieldrequests[].custom_idTypestringRequirementRequiredValues & limitsDefault—
Fieldrequests[].body.messagesTypemessage[]RequirementRequiredValues & limitsDefault—
Fieldcompletion_windowTypestringRequirementOptionalValues & limits
24h
Default—
FieldproviderTypeobject|nullRequirementOptionalValues & limitsDefault—
Fieldrequests[].body.modelTypestringRequirementOptionalValues & limits
anthropic/claude-haiku-4.5:batch, anthropic/claude-haiku-4.5
Default—
Fieldprovider.onlyTypestring[]RequirementOptionalValues & limits
anthropic
Default—
Fieldprovider.allow_fallbacksTypeboolean|nullRequirementOptionalValues & limits
false, null
Default—
Method parameters and lifecycle
ParameterContract
Parametercontent_typeContractapplication/json
ParameterrequiredContractendpoint, model, requests
Parametermaterial_typesContracttext
ParameterrepresentationContractinline requests[]; each item has custom_id and body
Parameterrequest_endpoint_profileContract/v1/chat/completions
Parameterfile_materialContractCaller may read actual UTF-8 JSONL locally into requests[]. No upload purpose, input_file_id or file reference is used. Missing/empty customer material stops preparation before POST.
Parameterserialization_orderContractendpoint, model, provider (if supplied), completion_window (if supplied), requests last
Parameteroptional_controlsContractprovider.only, provider.allow_fallbacks, completion_window
Parameterschema_scopeContractText Chat Completions bodies in the documented inline Batch envelope.

Lifecycle: asynchronous

GET /v1/batches/{operation_id} · actual original create response.id; same user/key/group

Pricing

Tariff references do not add request options. Supported parameters are listed for the selected method.

Fast mode
Not specified When fast mode is selected
Flex mode
Not specified When flex mode is selected
Maximum reasoning effort
Not specified When maximum reasoning effort uses the default adjustment
Explicit cache pricing
Enabled When explicit cache is requested

Ailoot rates

Prices by configuration

Match each charge to the conditions shown. Use one rate for each set of alternative configurations.

ConfigurationRate scheduleContext tokens, more thanContext tokens, up to and includingCharge
ConfigurationBase token ratesRate scheduleBase rateContext tokens, more than—Context tokens, up to and includingNo upper boundCharge
Input · Input tokens $0.001 / 1K tokens
Output · Output tokens $0.005 / 1K tokens
Input · Cache read $0.0001 / 1K tokens
Input · Cache write $0.00125 / 1K tokens
Input · Cache write, 1 hour $0.002 / 1K tokens
ConfigurationRequest-length tier 1Rate schedule—Context tokens, more than0Context tokens, up to and includingNo upper boundCharge
Input · Input tokens $0.001 / 1K tokens
Output · Output tokens $0.005 / 1K tokens
Input · Cache read $0.0001 / 1K tokens
Input · Cache write $0.00125 / 1K tokens
Input · Cache write, 1 hour $0.002 / 1K tokens

Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. How reservation and settlement work →

Example requests

Ailoot Ultra · Batch

curl · retained fixturePython HTTP · actual customer JSONLPython · save every completed result
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
python3 - <<'PY_REQUEST'
import json
from pathlib import Path
body=json.loads('{"endpoint":"/v1/chat/completions","model":"anthropic/claude-haiku-4.5:batch","requests":[{"custom_id":"req-0001","body":{"messages":[{"role":"user","content":"Hello!"}],"max_tokens":16}}]}')
Path("batch-request.json").write_text(json.dumps(body,ensure_ascii=False),encoding="utf-8")
PY_REQUEST
curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/batches \
  -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \
  --data-binary @batch-request.json -D batch-response-headers.txt -o batch-create-response.json
import json, os
from pathlib import Path
from urllib.request import Request, urlopen

def prepare_requests(customer_path):
    path = Path(customer_path)
    if not path.is_file(): raise ValueError("Customer JSONL file is missing")
    items = [json.loads(line) for line in path.read_text(encoding="utf-8").splitlines() if line.strip()]
    if not items: raise ValueError("Customer JSONL contains no requests")
    ids = set()
    for item in items:
        if set(item) != {"custom_id", "body"}: raise ValueError("Each item needs custom_id and body")
        cid = item["custom_id"]
        if not isinstance(cid, str) or not cid.strip() or cid in ids: raise ValueError("custom_id must be nonempty and unique")
        ids.add(cid)
        if not isinstance(item["body"], dict) or not item["body"].get("messages"): raise ValueError("Supply actual text messages")
        supplied_model = item["body"].get("model")
        if supplied_model is not None and supplied_model not in ['anthropic/claude-haiku-4.5:batch', 'anthropic/claude-haiku-4.5']: raise ValueError("body.model must be an exact documented caller or wire ID")
    return {"endpoint":"/v1/chat/completions", "model":"anthropic/claude-haiku-4.5:batch", "requests":items}

if __name__ == "__main__":
    material = os.environ.get("AILOOT_BATCH_REQUESTS_JSONL", "")
    if not material: raise SystemExit("Set AILOOT_BATCH_REQUESTS_JSONL to your actual customer file")
    body = prepare_requests(material)
    key = os.environ.get("AILOOT_API_KEY", "")
    if not key: raise SystemExit("Set AILOOT_API_KEY")
    request = Request("https://api.ailoot.ai/v1/batches", data=json.dumps(body, ensure_ascii=False).encode("utf-8"), headers={"Authorization":"Bearer " + key, "Content-Type":"application/json"}, method="POST")
    with urlopen(request) as response:
        raw = response.read()
        Path("batch-create-response.json").write_bytes(raw)
        print(raw.decode("utf-8"))
import json
from pathlib import Path
raw = Path("batch-status-response.json").read_bytes()
response = json.loads(raw)
if response.get("status") != "completed":
    raise SystemExit("Keep the original operation; read its status without resubmitting")
results = response.get("results")
if not isinstance(results, list) or not results:
    raise SystemExit("Preserve the original response; completed results are missing")
Path("batch-results.jsonl").write_text("".join(json.dumps(item, ensure_ascii=False) + "\n" for item in results), encoding="utf-8")
# Preserve batch-status-response.json with aggregate usage and every result/error.

Receive and save results

Ailoot Ultra · Batch

inline results[].response.body JSON

  • GET /v1/batches/{operation_id}
Check job status
curl · original operation status
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
BATCH_OPERATION_ID="$(python3 - <<'PY_ID'
import json
from pathlib import Path
from urllib.parse import quote
response = json.loads(Path("batch-create-response.json").read_text(encoding="utf-8"))
operation = response.get("id")
if not isinstance(operation, str) or not operation: raise SystemExit("No actual original operation ID; preserve the response and do not resubmit")
print(quote(operation, safe=""))
PY_ID
)"
curl --fail-with-body --silent --show-error "https://api.ailoot.ai/v1/batches/$BATCH_OPERATION_ID" \
  -H "Authorization: Bearer $AILOOT_API_KEY" -o batch-status-response.json
Keep all completed results

Keep every complete returned response, file and content part.

Preserve the full original status JSON, every result/custom_id and complete response or error body. Save completed results[] as JSONL without filtering.

If the original response needs checking

Preserve the original operation ID. 503 result_pending_check has X-Should-Retry:false; never resubmit an unknown original batch.

Response fields
FieldType
Fieldresults[].custom_idTypestring
Fieldresults[].response.body.choices[].message.contentTypestring|null
Fieldresults[].errorTypeobject|null
FieldusageTypeobject|null
FieldidTypestring
FieldmodelTypestring
FieldendpointTypestring
FieldstatusTypestring
Fieldrequest_countsTypeobject
Fieldresults[].idTypestring
Fieldresults[].response.status_codeTypeinteger
Fieldresults[].response.request_idTypestring
Errors and next steps
ResponseConditionNext step
Response400 · invalid_request_errorConditionInvalid documented inline envelope, duplicate keys, item identity, or configured model capabilities conflict.Next stepCorrect the indicated fields before any new submission.
Response401 · authentication_errorConditionInvalid API key.Next stepUse the authorized Ailoot key.
Response403 · permission_errorConditionBatch group unavailable.Next stepCheck key/group entitlement.
Response422 · invalid_request_errorConditionBatch uses balance billing; subscription creation is rejected.Next stepUse the authorized balance-billed group.
Response422 · price_unavailableConditionBatch input cannot be quoted.Next stepPreserve response; use documented family input.
Response402 · billing_errorConditionBatch reserve unavailable.Next stepResolve admission before a new request.
Response503 · price_unavailableConditionBatch method price/native rates unavailable.Next stepPreserve response; do not substitute prices.
Response503 · api_errorConditionExact supplier route unavailable.Next stepPreserve response for route repair.
Response503 · result_pending_checkConditionOriginal result requires checking; X-Should-Retry:false.Next stepKeep original operation_id/id and read its status; never repeat original POST.
Response404 · not_foundConditionBatch status operation absent or owned by another identity.Next stepUse exact original id and same user/key/group.

Aliases

Model aliases

Ailoot Ultra anthropic/claude-haiku-4.5:batch

Method path aliases

Use the method paths shown above.

Related caller IDs

anthropic/claude-haiku-4.5:batch

FAQ · Anthropic: Claude Haiku 4.5 (batch)
What inputs and results are available?

POST /v1/batches · anthropic/claude-haiku-4.5:batch: text → text

Which fields does the request use?

POST /v1/batches · anthropic/claude-haiku-4.5:batch: endpoint, model, requests, completion_window, provider

What limits apply?

POST /v1/batches · anthropic/claude-haiku-4.5:batch: requests.min_items: 1

More details

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