Pricing, context window, capabilities, and release date — pulled from each provider's public docs. Both are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.
Both models stream in parallel through your own AIgateway key. Tokens, latency, and cost update as they arrive.
| Claude Haiku 4.5 anthropic/claude-haiku-4.5 | Claude Sonnet 4.6 anthropic/claude-sonnet-4.6 | |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Family | Claude 4 | Claude 4 |
| Modality | text | text |
| Context window | 200,000 tok | 200,000 tok |
| Max output | 8,192 tok | 128,000 tok |
| Released | 2026-05-22 | 2026-05-22 |
| Input price | $1.00 /1M | $3.00 /1M |
| Output price | $5.00 /1M | $15.00 /1M |
| Cache read | $0.100 /1M | $0.300 /1M |
| Tools | yes | yes |
| Streaming | yes | yes |
| Vision | yes | yes |
| JSON mode | yes | yes |
| Reasoning | — | yes |
| Prompt caching | yes | yes |
Claude Haiku 4.5 delivers similar levels of coding performance at one-third the cost and more than twice the speed of larger models.
Claude Sonnet 4.6 is Anthropic's latest balanced model offering strong coding, reasoning, and agentic capabilities with improved instruction following.
# pip install aigateway-py openai
# aigateway-py: sub-accounts, evals, replays, jobs, webhook verify.
# openai SDK: chat/embeddings/images/audio — drop-in compat per our SDK's own guidance.
from openai import OpenAI
client = OpenAI(
base_url="https://api.aigateway.sh/v1",
api_key="sk-aig-...",
)
# Try Claude Haiku 4.5
client.chat.completions.create(
model="anthropic/claude-haiku-4.5",
messages=[{"role":"user","content":"hello"}],
)
# Try Claude Sonnet 4.6 — same client, same key
client.chat.completions.create(
model="anthropic/claude-sonnet-4.6",
messages=[{"role":"user","content":"hello"}],
)