Claude Sonnet 4.6 Pricing Explained — Caching, Tiers, and How to Save 45% with Crazyrouter#

Claude Sonnet 4.6 is Anthropic's latest mid-range model — released in February 2026. It sits between the budget-friendly Haiku line and the premium Opus tier, making it the default choice for most production workloads: coding, chat, document analysis, and tool use.

But Anthropic's pricing isn't just "input + output." There's a layered caching system with two TTL tiers, a Batch API discount, and a data residency surcharge that can all stack on top of each other. This guide breaks down every component so you know exactly what you're paying — and how to pay less.

Last updated: April 27, 2026

Disclaimer: Prices in this article are accurate as of the publication date. Anthropic may adjust pricing at any time. Always verify on the official Anthropic pricing page before making production decisions.

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Base Token Pricing#

The foundation of Claude Sonnet 4.6 pricing is straightforward:

Token Type	Price per 1M Tokens
Input (base)	$3.00
Output	$15.00

That's a 5:1 output-to-input ratio. For every dollar you spend on input tokens, you'd spend five dollars on the same number of output tokens. This ratio matters — if your workload is output-heavy (code generation, long-form writing), output costs will dominate your bill.

Quick reference: what does this actually cost?#

Workload	Tokens	Cost
1 short chat turn (500 in / 200 out)	700 total	$0.0045
1 code review (2K in / 1K out)	3K total	$0.021
1 document summary (10K in / 2K out)	12K total	$0.06
1 hour of chatbot traffic (500K in / 200K out)	700K total	$4.50
1 day of heavy API usage (5M in / 2M out)	7M total	$45.00

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Prompt Caching: The Biggest Cost Lever#

Prompt caching is where Anthropic's pricing gets interesting — and where the real savings live.

How it works#

When you send a request with cache_control enabled, Anthropic stores the computed state of your prompt prefix. On subsequent requests that start with the same bytes (same system prompt, same few-shot examples, same preamble), those tokens are served from cache instead of being reprocessed.

There are two cache duration tiers:

Cache Operation	Price per 1M Tokens	Multiplier vs Base Input	Duration
5-minute cache write	$3.75	1.25x	5 minutes
1-hour cache write	$6.00	2.0x	1 hour
Cache hit (read)	$0.30	0.1x	—

The math: when does caching pay off?#

5-minute cache (1.25x write):

• Write cost: $3.75/M (you pay 25% more than base input on the first request)
• Read cost: $0.30/M (you pay 90% less on every subsequent request)
• Break-even: 1 cache read. After just one cache hit, you've saved money.
  • Write: $3.75 → Read:$0.30 → Total for 2 requests: $4.05
  • Without cache: $3.00 × 2 =$6.00
  • Savings: $1.95 (32.5%)

1-hour cache (2.0x write):

• Write cost: $6.00/M (you pay double on the first request)
• Read cost: $0.30/M (same 90% discount on reads)
• Break-even: 2 cache reads. After two hits, you're ahead.
  • Write: $6.00 → 2 Reads:$0.60 → Total for 3 requests: $6.60
  • Without cache: $3.00 × 3 =$9.00
  • Savings: $2.40 (26.7%)

When to use which cache tier#

Scenario	Recommended Cache	Why
Real-time chatbot (many requests/minute)	5-minute	High request frequency, cache stays warm
Batch processing (bursts every few minutes)	5-minute	Requests cluster within 5-min windows
Long-running agent sessions	1-hour	Requests spread over 10-60 minutes
Scheduled jobs (hourly reports)	1-hour	Predictable hourly pattern
One-off requests	No cache	No reuse opportunity

How to enable caching#

Automatic caching (recommended for most cases):

Explicit cache breakpoints (fine-grained control):

Reading your cache usage in the response#

Every response includes cache metrics in the usage object:

• cache_creation_input_tokens: tokens written to cache (charged at 1.25x or 2x)
• cache_read_input_tokens: tokens read from cache (charged at 0.1x)
• input_tokens: tokens processed normally (charged at base rate)

Your actual input cost for a request is:

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Batch API Discount#

Anthropic offers a Batch API for asynchronous processing. You submit requests in bulk, and results are returned within 24 hours. The tradeoff: no real-time responses, but you get a 50% discount on all token types.

Token Type	Standard	Batch API
Input	$3.00/M	$1.50/M
Output	$15.00/M	$7.50/M
5-min cache write	$3.75/M	$1.875/M
1-hour cache write	$6.00/M	$3.00/M
Cache hit	$0.30/M	$0.15/M

The Batch discount stacks with caching. If you're running a nightly batch job with a consistent system prompt, you get both the 50% batch discount AND the 0.1x cache read discount on repeated prefixes. That's $0.15/M for cached input tokens in batch mode — 95% cheaper than standard base input.

When to use Batch API#

• Bulk content generation (product descriptions, summaries)
• Large-scale data extraction or classification
• Evaluation runs across hundreds of test prompts
• Any workload where latency doesn't matter

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Data Residency Surcharge#

Starting with Claude Sonnet 4.5 and newer models (including Sonnet 4.6), Anthropic charges a 1.1x multiplier if you specify US-only inference via the inference_geo parameter.

Token Type	Global (default)	US-only (1.1x)
Input	$3.00/M	$3.30/M
Output	$15.00/M	$16.50/M
Cache write (5min)	$3.75/M	$4.125/M
Cache hit	$0.30/M	$0.33/M

This surcharge stacks with everything else. If you use US-only + Batch + caching, all multipliers apply.

Most users don't need this — global routing is the default and has no surcharge. Only enable inference_geo if you have strict data residency requirements.

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Crazyrouter Pricing: 45% Off#

Through Crazyrouter, Claude Sonnet 4.6 is available at 55% of official pricing — a 45% discount on base token rates.

Token Type	Anthropic Official	Crazyrouter (55%)
Input	$3.00/M	$1.65/M
Output	$15.00/M	$8.25/M

Crazyrouter supports both OpenAI-compatible and native Anthropic API formats, so you can use whichever SDK you prefer.

Code example: using Claude Sonnet 4.6 via Crazyrouter#

OpenAI-compatible format:

Anthropic-native format:

curl:

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Real-World Cost Comparison#

Let's compare costs for three common workloads: Anthropic direct vs Crazyrouter.

Scenario 1: Chatbot — 1M input + 500K output tokens per day#

	Anthropic Direct	Crazyrouter
Input cost	$3.00	$1.65
Output cost	$7.50	$4.125
Daily total	$10.50	$5.775
Monthly (30 days)	$315.00	$173.25
Monthly savings	—	$141.75 (45%)

Scenario 2: Code generation — 500K input + 2M output tokens per day#

	Anthropic Direct	Crazyrouter
Input cost	$1.50	$0.825
Output cost	$30.00	$16.50
Daily total	$31.50	$17.325
Monthly (30 days)	$945.00	$519.75
Monthly savings	—	$425.25 (45%)

Scenario 3: Chatbot with 60% cache hit rate — 1M input + 500K output per day#

With caching on Anthropic direct:

• 400K cache write tokens (5min): 400K × $3.75/M =$1.50
• 600K cache hit tokens: 600K × $0.30/M =$0.18
• 500K output tokens: 500K × $15.00/M =$7.50
• Daily total: $9.18

With Crazyrouter (no native cache, but 45% off base):

• 1M input tokens: 1M × $1.65/M =$1.65
• 500K output tokens: 500K × $8.25/M =$4.125
• Daily total: $5.775

Even with Anthropic's caching at 60% hit rate, Crazyrouter's flat 45% discount still comes out cheaper for this workload. The gap narrows at very high cache hit rates (80%+), where Anthropic's cache reads at $0.30/M become extremely cheap.

Break-even analysis: when is Anthropic direct + caching cheaper?#

At what cache hit rate does going direct to Anthropic beat Crazyrouter?

For a pure input workload (ignoring output for simplicity):

• Crazyrouter cost per 1M input: $1.65
• Anthropic with cache: (1 - hit_rate) × $3.75 + hit_rate ×$0.30

Solving: $1.65 = (1 - x) ×$3.75 + x × $0.30

• $1.65 =$3.75 - $3.45x
• $3.45x =$2.10
• x = 60.9%

At cache hit rates above ~61%, going direct to Anthropic with 5-minute caching is cheaper for input tokens. But remember: output tokens have no caching discount, and Crazyrouter's 45% off applies to output too. For output-heavy workloads, Crazyrouter wins at any cache hit rate.

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Pricing Summary Table#

Component	Anthropic Official	Crazyrouter
Base input	$3.00/M	$1.65/M
Base output	$15.00/M	$8.25/M
5-min cache write	$3.75/M (1.25x)	—
1-hour cache write	$6.00/M (2.0x)	—
Cache hit	$0.30/M (0.1x)	—
Batch input	$1.50/M (50% off)	—
Batch output	$7.50/M (50% off)	—
US-only surcharge	1.1x all prices	—
Supported formats	Anthropic API	OpenAI + Anthropic

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Key Takeaways#

1. Base pricing is $3/M input,$15/M output. Output is 5x more expensive — optimize for shorter outputs when possible.

2. Prompt caching saves up to 90% on input tokens. The 5-minute cache pays for itself after just 1 reuse. The 1-hour cache needs 2 reuses.

3. Batch API cuts everything by 50%. Stack it with caching for up to 95% savings on cached input tokens.

4. Crazyrouter offers a flat 45% discount on base token rates, with no caching complexity to manage. For output-heavy workloads, this is often the better deal.

5. The optimal strategy depends on your workload. High cache hit rates + input-heavy = go direct. Output-heavy or unpredictable traffic = Crazyrouter wins.

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Get Started#

Sign up at crazyrouter.com to access Claude Sonnet 4.6 at 45% off — along with 300+ other models from OpenAI, Google, xAI, and more, all through one API key.

Try Claude Sonnet 4.6 on Crazyrouter →