Claude Sonnet 5.5 API pricing
Anthropic's mid-priced workhorse. Claude Sonnet 5.5 launched on 28 September 2026 at $2 / $10 per 1M tokens, the same price as Sonnet 5, which it replaces.
Claude Sonnet 5.5 prices
Joint most expensive of 8 current workhorse models (blended 3:1). Cheapest: MiniMax M3, $0.30 / $1.20.
Capability score 166, 7th of 29 current models scored on the Epoch Capabilities Index (range 164–169).
GPT-6.1 Terra scores level (168) and costs 2× less on a coding agent: $213 vs $427 a month.
Source: Epoch Capabilities Index by Epoch AI, CC BY 4.0, read 11 Nov 2026. What the score means
What it costs in practice
Claude Sonnet 5.5 at list prices, no batch discount.
| 1,000 chat replies1,500 tokens in and 300 out each | $6.00 |
|---|---|
| Summarising 100 long reports20,000 tokens in and 800 out each | $4.80 |
| A month of a coding agent400 tasks, 85% of input cached | $369 |
The coding-agent example assumes 85% of input is served from cache, typical for agents that resend the same context each step. Work out AI agent cost on Claude Sonnet 5.5
Details
claude-sonnet-5-5- Same input and output price as Claude Sonnet 5. Anthropic says it uses fewer tokens per task, costing up to 30% less for the same work.
- Cache reads were halved from $0.20 to $0.10 per 1M tokens on 7 October 2026.
- Higher-risk cybersecurity requests fall back to Claude Sonnet 5.
Checked 11 Nov 2026 against Anthropic pricing , Anthropic, 28 Sep 2026 and Anthropic, 7 Oct 2026 (cache price cut) .
Estimate your monthly cost
List prices, no batch discount
| Model | Input / output per 1M | Per month |
|---|---|---|
| Claude Sonnet 5.5 | $2.00 / $10.00 | $40.00 |
| MiniMax M3Cheaper alternative · MiniMax | $0.30 / $1.20 | $5.40 |
| GPT-6.1 SolSimilar price · OpenAI | $2.00 / $10.00 | $40.00 |
Type amounts like 500K, 25M or 2B.
Price Claude Sonnet 5.5 in: Token cost calculator · AI agent cost · Token counter · Claude Code plans
Cheaper alternative
MiniMax M3 (MiniMax) costs $0.30 / $1.20 per 1M tokens, 87% less than Claude Sonnet 5.5 at a 3:1 input-to-output mix. It’s the cheapest current workhorse model from another family. Cheaper doesn’t mean as good: test it on your own tasks.
Compare Claude Sonnet 5.5 with MiniMax M3
Similar price from another provider: GPT-6.1 Sol, $2.00 / $10.00. Compare
Compare Claude Sonnet 5.5 with
Side by side: prices, cached and batch rates, and the cost of the same workload.
Other Claude Sonnet versions
Sonnet 5 is still served at $2 / $10, and Sonnet 4.6 and 4.5 at $3 / $15.
| Model | Input / 1M | Output / 1M | Cached input | Context | Released |
|---|---|---|---|---|---|
| $2.00 | $10.00 | $0.20 | 1M | 30 Jun 2026 | |
| $3.00 | $15.00 | $0.30 | 1M | Feb 2026 | |
| $3.00 | $15.00 | $0.30 | 200K | 29 Sep 2025 |
Version details
Claude Sonnet 5
Previous$2.00 / $10.00 per 1M tokenscached $0.20 · batch 50% off · 1M context · 128K max output
- The $2 / $10 launch price was made permanent; a planned rise to $3 / $15 on 1 September was cancelled.
Newer option: Claude Sonnet 5.5 at $2.00 / $10.00. Checked 11 Nov 2026 against Anthropic pricing and TechCrunch, 30 Jun 2026 .
Claude Sonnet 4.6
Previous$3.00 / $15.00 per 1M tokenscached $0.30 · batch 50% off · 1M context · 64K max output
Newer option: Claude Sonnet 5.5 at $2.00 / $10.00. Checked 11 Nov 2026 against Anthropic pricing .
Claude Sonnet 4.5
Previous$3.00 / $15.00 per 1M tokenscached $0.30 · batch 50% off · 200K context · 64K max output
Newer option: Claude Sonnet 5.5 at $2.00 / $10.00. Checked 11 Nov 2026 against Anthropic pricing .
Compare Claude Sonnet 5.5
Price history
All changes- Anthropic halved Claude Sonnet 5.5's cache-read price from $0.20 to $0.10 per 1M tokens; Anthropic says this cuts most agent workloads by about 20%. Source
- Claude Sonnet 5.5 replaced Sonnet 5 at the same $2 / $10 per 1M tokens, with cache reads at $0.20. Source
- ▼ 33%Anthropic launched Claude Sonnet 5 at $2 / $10, cheaper than Sonnet 4.6's $3 / $15.
$3 / $15→ $2 / $10 Source - Anthropic retired Claude Opus 4 and Claude Sonnet 4. Source
Every dated price: price records · CSV. Cite as: AI Token Price, Claude Sonnet pricing, https://aitokenprice.com/pricing/claude-sonnet#price-history
Anthropic pricing rules
- Batch requests cost 50% less.
- Cache reads are billed at a per-model rate, usually a tenth of the input price or less. Cache writes cost 1.25× input for the 5-minute cache and 2× for the 1-hour cache.
- The full 1M-token context window is billed at standard rates on current models.
Retired Claude Sonnet models
- Retired 15 Jun 2026Claude Sonnet 4 was $3.00 / $15.00 per 1M tokens. Use Claude Sonnet 5 instead.
Questions
How much does Claude Sonnet 5.5 cost?
As of 11 Nov 2026, Claude Sonnet 5.5 costs $2 per million input tokens and $10 per million output tokens, and $0.10 per million cached input tokens. Batch requests cost 50% less. Prices checked 11 Nov 2026.
What is Claude Sonnet 5.5's context window?
1M tokens, with up to 128K tokens of output.
Does Claude Sonnet 5.5 support prompt caching?
Yes. Repeated input read from the cache costs $0.10 per million tokens, 95% less than normal input.