MODELS / ANTHROPIC

Claude Sonnet 4.5 (Batch)

Claude Sonnet 4.5 is the newest model in the Sonnet series, offering improvements and updates over Sonnet 4.

TEXTREASONINGEXPLICIT-CACHINGFILE-INPUTREASONINGTOOL-USEVISIONSTRUCTURED-OUTPUT
1M
CONTEXT WINDOW
64K
MAX OUTPUT TOKENS
$1.50
INPUT PRICE / 1M TOKENS
$7.50
OUTPUT PRICE / 1M TOKENS
QUICKSTART

Call it in one request.

OpenAI-compatible: change the base URL, and the setup is complete.

curl https://enterprise.blackbox.ai/v1/chat/completions \
  -H "Authorization: Bearer $BLACKBOX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "blackboxai/anthropic/claude-sonnet-4.5-batch",
    "messages": [{ "role": "user", "content": "Hello!" }],
    "stream": true
  }'
SPECIFICATIONS

The full spec sheet.

Context, pricing, modalities, routing, and deployment: everything Claude Sonnet 4.5 (Batch) supports, in one table.

MODEL ID
blackboxai/anthropic/claude-sonnet-4.5-batch
DEVELOPED BY
Anthropic
MODEL TYPE
Text
RELEASED
Sep 29, 2025
CONTEXT WINDOW
1M
MAX OUTPUT TOKENS
64K
INPUT MODALITIES
text, image, pdf
OUTPUT MODALITIES
text
INPUT PRICE
$1.50 / 1M tokens
OUTPUT PRICE
$7.50 / 1M tokens
INPUT PRICE (>200K)
$3 / 1M tokens
CACHE READ
$0.15 / 1M tokens
CACHE WRITE
$1.88 / 1M tokens
REASONING
Supported
DATA RETENTION
Standard retention
DEDICATED DEPLOYMENT
Not available (closed-weight model)
SUPPORTED PARAMETERS
max_tokenstemperaturestoptoolstool_choicereasoninginclude_reasoningresponse_formatstructured_outputs