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Anthropic: Claude Sonnet 4.5 (batch)

anthropic/claude-sonnet-4.5:batch

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Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with improvements across system design, code security, and specification adherence. The model is designed for extended autonomous operation, maintaining task continuity across sessions and providing fact-based progress tracking.

Sonnet 4.5 also introduces stronger agentic capabilities, including improved tool orchestration, speculative parallel execution, and more efficient context and memory management. With enhanced context tracking and awareness of token usage across tool calls, it is particularly well-suited for multi-context and long-running workflows. Use cases span software engineering, cybersecurity, financial analysis, research agents, and other domains requiring sustained reasoning and tool use.

Modalities

In / Out Price

$1.50 / $7.50per 1M

Context

1M

Released

Sep 29, 2025

Knowledge Cutoff

Jan 2025

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ProvidersPricingPerformanceUptimeBenchmarksAppsActivityFAQ

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick — Balanced (price + speed), Nitro (fastest), or Exacto (highest tool-calling accuracy).

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Benchmarks

Scores on standardized evaluations. Higher percentages are better — and rank percentile shows where this model lands among all models on OpenRouter.

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Activity

Token volume and request traffic to this model over time.

Quick Start

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

About Anthropic: Claude Sonnet 4.5 (batch)

OpenRouter makes Anthropic: Claude Sonnet 4.5 (batch) available through a unified, OpenAI-compatible API using the model ID anthropic/claude-sonnet-4.5:batch. It is served by Anthropic.

Anthropic: Claude Sonnet 4.5 (batch) accepts text, images and files such as PDFs and returns text. It has a 1,000,000-token context window and a maximum output of 64,000 tokens.

On OpenRouter, Anthropic: Claude Sonnet 4.5 (batch) costs $1.50/M input tokens and $7.50/M output tokens, with separate rates for Cache Read at $0.15/M tokens, Cache Write at $1.875/M tokens, Cache Write (1h) at $3.00/M tokens and Web Search at $10.00/1K calls. Effective pricing can be lower when prompt caching applies. It was released on September 29, 2025; its knowledge cutoff is January 31, 2025.

More models from Anthropic

  • Claude Opus 5 (Fast)
  • Claude Opus 5
  • Claude Sonnet 5

Frequently asked questions

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with improvements across system design, code security, and specification adherence.

Claude Sonnet 4.5 (batch) costs $1.50/M input tokens and $7.50/M output tokens, with separate rates for Cache Read at $0.15/M tokens, Cache Write at $1.875/M tokens, Cache Write (1h) at $3.00/M tokens and Web Search at $10.00/1K calls.

Claude Sonnet 4.5 (batch) has a 1,000,000 token context window. It supports up to 64,000 completion tokens.

Yes. Claude Sonnet 4.5 (batch) accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

Claude Sonnet 4.5 (batch) accepts text, images and files such as PDFs as input and returns text.

Claude Opus 5 (Fast), Claude Opus 5, Claude Sonnet 5 and 13 more are other text models from Anthropic.

Claude Sonnet 4.5 (batch) was released on September 29, 2025. Its knowledge cutoff is January 31, 2025.

$1.50$7.50$0.15----
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AutoExacto Benchmarks
GPQA DiamondTAU-Bench
auto-routing
83.4%75.9%
Amazon Bedrock
82.6%76.4%
Amazon Bedrock (EU)
82.2%76.4%
Anthropic
82.0%75.9%
Claude Platform on AWS
79.5%76.9%
Google Vertex (US)
81.9%74.1%
Google Vertex (Global)
81.2%74.1%
Claude Platform on AWS
80.5%74.5%
Azure
78.0%74.0%
+1 more providers

Not enough uptime data to display yet.

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and customization options.

Not enough data for apps using this model yet.