MODELS / ANTHROPIC

Claude Opus 4.5

Claude Opus 4.5 is Anthropic’s latest model in the Opus series, meant for demanding reasoning tasks and complex problem solving. This model has improvements in general intelligence and vision compared to previous iterations. In addition, it is suited for difficult coding tasks…

TEXTREASONINGEXPLICIT-CACHINGFILE-INPUTREASONINGTOOL-USEVISIONWEB-SEARCH
200K
CONTEXT WINDOW
64K
MAX OUTPUT TOKENS
$5
INPUT PRICE / 1M TOKENS
$25
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-opus-4.5",
    "messages": [{ "role": "user", "content": "Hello!" }],
    "stream": true
  }'
SPECIFICATIONS

The full spec sheet.

Context, pricing, modalities, routing, and deployment: everything Claude Opus 4.5 supports, in one table.

MODEL ID
blackboxai/anthropic/claude-opus-4.5
DEVELOPED BY
Anthropic
MODEL TYPE
Text
RELEASED
Nov 24, 2025
CONTEXT WINDOW
200K
MAX OUTPUT TOKENS
64K
INPUT MODALITIES
text, image, pdf
OUTPUT MODALITIES
text
INPUT PRICE
$5 / 1M tokens
OUTPUT PRICE
$25 / 1M tokens
CACHE READ
$0.5 / 1M tokens
CACHE WRITE
$6.25 / 1M tokens
REASONING
Supported
DATA RETENTION
Standard retention
DEDICATED DEPLOYMENT
Not available (closed-weight model)
SUPPORTED PARAMETERS
max_tokenstemperaturestoptoolstool_choicereasoninginclude_reasoning