Anthropic Claude Sonnet 4.5

Perplexity responses

Anthropic Claude Sonnet 4.5 is a Perplexity responses-API model. Capabilities include function calling. Route Anthropic Claude Sonnet 4.5 via Future AGI's Agent Command Center for unified observability, caching, and 15 routing strategies including cost-optimized fallback.

Pricing source: unknown Last verified: May 12, 2026 View source ↗
Pricing not yet public

We don't have verified per-token pricing for Anthropic Claude Sonnet 4.5 yet. If you have a source from Perplexity'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
Max input
Max output
Modalities
text

Capabilities

  • Function calling ✓ supported
  • Parallel tool calls — not advertised
  • Vision input — not advertised
  • 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

  • +agentic workflows that depend on reliable tool calls

Watch out for

  • No major caveats flagged from public spec.

Benchmarks pending

We haven't logged public benchmark scores for Anthropic Claude Sonnet 4.5 yet. Have one to contribute? Submit a source — citations help us prioritise.

Try it

Call Anthropic 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.

SDK
Native Future AGI client (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.
# Anthropic 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="perplexity/anthropic-claude-sonnet-4-5",
    messages=[{"role": "user", "content": "Hello, Anthropic 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="perplexity/anthropic-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"))
Set AGENTCC_API_KEY with a key fromapp.futureagi.com.Gateway docs ↗

Same model on other providers

anthropic-claude-sonnet-4-5 is also available via 2 other routes. Pricing, regions, and capabilities can differ — compare before routing production traffic.

ProviderInput / 1MOutput / 1MVerified
GMI Cloud$3.00/M$15.00/MMay 12, 2026
OpenRouter$3.00/M$15.00/MMay 12, 2026

Compare with similar models

Anthropic Claude Sonnet 4.5 doesn't have a public Arena ELO score yet, so we group by provider only — quality-tier comparisons need a benchmark.

FAQ

How much does Anthropic Claude Sonnet 4.5 cost?

Public per-token pricing for Anthropic 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 Anthropic Claude Sonnet 4.5?

Context window for Anthropic Claude Sonnet 4.5 is not currently public.

Does Anthropic Claude Sonnet 4.5 support function calling?

Yes — Anthropic Claude Sonnet 4.5 supports function (tool) calling.

Is Anthropic Claude Sonnet 4.5 good for production?

Anthropic Claude Sonnet 4.5 is well-suited for agentic workflows that depend on reliable tool calls.

How can I route to Anthropic 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 Anthropic Claude Sonnet 4.5

Official sources, independent benchmarks, and pricing aggregators — no random search-engine guesses.