Claude Sonnet 4.5
GitHub Copilot chatClaude Sonnet 4.5 is a GitHub Copilot chat model.It supports a 128,000-token context windowwith up to 16,000 output tokens. Capabilities include function calling, vision. Route Claude Sonnet 4.5 via Future AGI's Agent Command Center for unified observability, caching, and 15 routing strategies including cost-optimized fallback.
We don't have verified per-token pricing for Claude Sonnet 4.5 yet. If you have a source from GitHub Copilot's documentation, help us add it — your submission gets reviewed within 48 hours.
Pricing
Per-token rates, expressed in USD per 1M tokens. Verified May 12, 2026.
| Input | — | |
| Output | — |
Limits
- Context window
- 128,000 tokens
- Max input
- 128,000 tokens
- Max output
- 16,000 tokens
- Modalities
- vision, text
Capabilities
- Function calling ✓ supported
- Parallel tool calls ✓ supported
- Vision input ✓ supported
- Audio input — not advertised
- Audio output — not advertised
- PDF input — not advertised
- Streaming ✓ supported
- Structured output — not advertised
- Prompt caching — not advertised
- Reasoning — not advertised
Where it's strong
- +parallel tool calls — only 21% of chat models on Future AGI advertise this
Watch out for
- !strict structured output — no JSON-schema enforcement, expect retry loops
Benchmark scores
Reported public benchmark numbers. Each row links to the source. Faded bar shows 6-peer average for context.
Call Claude Sonnet 4.5 via Agent Command Center
One OpenAI-compatible endpoint. Routing, fallback, semantic caching, guardrails, and cost tracking come along for the ride. First 100K requests + 100K cache hits free every month.
agentcc / @agentcc/client). Per-call metadata — provider, cost, latency, cache hit, request id — is returned on x-agentcc-* response headers, so any HTTP client can read it.# Claude Sonnet 4.5 via the Agent Command Center Python SDK
# pip install agentcc
import os
from agentcc import AgentCC
client = AgentCC(
api_key=os.environ["AGENTCC_API_KEY"], # from app.futureagi.com → Settings → API Keys
base_url="https://gateway.futureagi.com/v1",
)
resp = client.chat.completions.create(
model="github-copilot/claude-sonnet-4-5",
messages=[{"role": "user", "content": "Hello, Claude Sonnet 4.5!"}],
)
print(resp.choices[0].message.content)
print(f"Tokens: {resp.usage.total_tokens}")
# Per-call gateway metadata is returned on x-agentcc-* response headers.
# When you need it programmatically, use .with_raw_response to get them:
raw = client.chat.completions.with_raw_response.create(
model="github-copilot/claude-sonnet-4-5",
messages=[{"role": "user", "content": "Same call, but I want the headers."}],
)
print("Provider:", raw.headers.get("x-agentcc-provider"))
print("Latency:", raw.headers.get("x-agentcc-latency-ms"), "ms")
print("Cost: ", raw.headers.get("x-agentcc-cost"), "USD")
print("Cache: ", raw.headers.get("x-agentcc-cache"))AGENTCC_API_KEY with a key fromapp.futureagi.com.Gateway docs ↗Advanced: fallback + cache config (YAML) ▸
strategy: cost-optimized
targets:
- model: claude-sonnet-4-5
provider: github-copilot
weight: 80
fallbacks:
- model: claude-opus-4-6
provider: azure-ai-foundry
- model: claude-opus-4-6-20260205
provider: anthropic
guardrails: [pii, prompt-injection, secrets]
cache: { exact: true, semantic: true } Same model on other providers
claude-sonnet-4-5 is also available via 3 other routes. Pricing, regions, and capabilities can differ — compare before routing production traffic.
| Provider | Input / 1M | Output / 1M | Verified |
|---|---|---|---|
| Anthropic | $3.00/M | $15.00/M | May 12, 2026 |
| Azure AI Foundry | $3.00/M | $15.00/M | May 12, 2026 |
| Google Vertex AI | $3.00/M | $15.00/M | May 12, 2026 |
Compare with similar models
Grouped by Chatbot Arena tier (Claude Sonnet 4.5 sits at 1454 ELO).
- Claude Opus 4.6Azure AI Foundry · $5.00/M in · $25.00/M out · 200,000 ctx
- Claude Opus 4.6 (2026-02-05)Anthropic · $5.00/M in · $25.00/M out · 1,000,000 ctx
- Gemini 3.1 Pro previewGoogle Vertex AI · $2.00/M in · $12.00/M out · 1,048,576 ctx
- Claude Opus 4.7Azure AI Foundry · $5.00/M in · $25.00/M out · 200,000 ctx
FAQ
How much does Claude Sonnet 4.5 cost?
Public per-token pricing for Claude Sonnet 4.5 is not yet published. Submit a source on this page to help us add it.
What is the context window of Claude Sonnet 4.5?
Claude Sonnet 4.5 supports a 128,000-token context window with up to 16,000 output tokens.
Does Claude Sonnet 4.5 support function calling?
Yes — Claude Sonnet 4.5 supports function (tool) calling, including parallel tool calls.
Is Claude Sonnet 4.5 good for production?
Claude Sonnet 4.5 is well-suited for parallel tool calls — only 21% of chat models on Future AGI advertise this. Consider alternatives if you need strict structured output — no JSON-schema enforcement, expect retry loops.
How can I route to Claude Sonnet 4.5 with fallback?
Use Agent Command Center: a single OpenAI-compatible endpoint that supports cost-optimized routing, latency-aware retries, model fallback, and shadow traffic. Configure once, swap models without app changes.
Useful links for Claude Sonnet 4.5
Official sources, independent benchmarks, and pricing aggregators — no random search-engine guesses.
Third-party evals — verify the marketing.
Cross-check our number against the rest of the ecosystem.