gpt-5.3-instant · OpenAI · text
GPT-5.3 Instant is OpenAI's ultra-fast, economical model, with a 272K context window, low latency, and excellent value. It supports Function Calling, Structured Output, and cached_input, making it ideal for high-concurrency, low-latency scenarios such as customer support, classification, summarization, and lightweight code completion.
272K context; automatic cached_input (50% of input price); Function Calling; Structured Output; visual understanding; JSON mode; high-speed responses.
High-concurrency customer support; classification and tagging; summary generation; lightweight code completion; image recognition; form extraction; batch data processing.
No image generation; cache_write not supported; weaker reasoning than GPT-5.2; max_tokens capped at 16K.
Anthropic official CLI coding agent. Multi-file edits, tool use, long-context reasoning.
export ANTHROPIC_AUTH_TOKEN="YOUR_API_KEY"
export ANTHROPIC_BASE_URL="https://api.robovai.com"
export ANTHROPIC_MODEL="gpt-5.3-instant"
claude