GPT-5.6 Sol
openai/gpt-5.6-solGPT-5.6 Sol is the flagship tier of OpenAI's GPT-5.6 reasoning family, accepting text and image input; OpenAI says it roughly corresponds to the unsuffixed tier of earlier GPT-5 families, and the plain GPT-5.6 name routes to it. OpenAI positions it for complex professional work, including coding, knowledge work, cybersecurity and science. Pick it over GPT-5.6 Terra or Luna when tasks need the most capability in this family, or the Sol Pro variant for the hardest requests.
- Input price
- $3.60
$4.00USD / 1M tokens - Output price
- $18.00
$20.00USD / 1M tokens - Cache read
- $0.36
$0.40USD / 1M tokens - Cache write
- $4.50
$5.00USD / 1M tokens - Context window
- 1.1M
- Max output
- 128K
Specifications
- Input
- Text, image
- Output
- Text
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Choose either supported API with unified authentication and usage tracking.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/responses" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "openai/gpt-5.6-sol",
"input": "Hello",
"max_output_tokens": 2048
}
SANDBASE_JSON
)
printf '%s\n' "$result"Questions
FAQ
How do I call OpenAI GPT-5.6 Sol through SandBase?
Create a SandBase API key, then send requests with the model ID "openai/gpt-5.6-sol" to Responses API (/v1/responses) or Chat Completions API (/v1/chat/completions) at https://api.sandbase.ai. The request examples on this page show the exact payload.
How much does OpenAI GPT-5.6 Sol cost?
$3.60 per 1M input tokens and $18 per 1M output tokens with the current 10% discount (list price $4 / $20), billed per request from your SandBase balance.
What is the context window of OpenAI GPT-5.6 Sol?
1.1M tokens of context, with up to 128K output tokens per response.
Which features does OpenAI GPT-5.6 Sol support?
OpenAI GPT-5.6 Sol supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.
Do I need a separate OpenAI account?
No. One SandBase API key and balance gives you access to OpenAI GPT-5.6 Sol and the other models in the catalog; you do not need to sign up with OpenAI separately.