Documentation
Models

GPT-5.5

tools vision

gpt-5.5OpenAI’s newest model, GPT 5.5

Try in playground

Input / 1M tokens

$5

$0.000005 / token

Output / 1M tokens

$30

$0.00003 / token

Cached input / 1M

$0.5

Uptime · 24h

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No traffic yet

Details

Type
Chat
Input
file, image, text
Output
text
Context
1,050,000 tokens

Supported parameters

max_tokenstemperaturetop_pstopseedpresence_penaltyfrequency_penaltyresponse_formatpluginstoolstool_choiceparallel_tool_calls

Last 24 hours

Requests per hour; red = provider errors.

Avg latency
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Avg first token
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Throughput
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Use it

curl https://api.ultragpt.pro/v1/chat/completions \
  -H "Authorization: Bearer $ULTRAGPT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.5",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

Anthropic SDK / Claude Code

curl https://api.ultragpt.pro/v1/messages \
  -H "x-api-key: $ULTRAGPT_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.5",
    "max_tokens": 1024,
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'