Pricing per million tokens, context window, capabilities — pulled from each provider's public docs. All 2 are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.
Claude Fable 5.1 is Anthropic's next model in the Fable family, with improvements in agentic coding, long-running agentic workflows, knowledge work, front-end and visual code generation, and finance and analysis tasks. It supports adaptive thinking and a 1M token context window.
GPT-5.6 Sol is OpenAI's frontier GPT-5.6 model for complex professional work, using the Responses API for reasoning and stateful context management.
from openai import OpenAI
client = OpenAI(
base_url="https://api.aigateway.sh/v1",
api_key="sk-aig-...",
)
# Claude Fable 5.1
client.chat.completions.create(
model="anthropic/claude-fable-5.1",
messages=[{"role":"user","content":"hello"}],
)
# GPT-5.6 Sol
client.chat.completions.create(
model="openai/gpt-5.6-sol",
messages=[{"role":"user","content":"hello"}],
)