ARCHIVE PRICERETIRED FEB 2026200K CONTEXTEXTENDED THINKINGPROMPT CACHING
Claude Sonnet 3.7 API Pricing
Archive profile for Anthropic's first hybrid reasoning Sonnet. The last published launch price was $3/M input and $15/M output, with cache reads modeled at $0.30/M. Anthropic now lists the API model as retired, so use this page for historical invoices and migration comparisons, not new deployments.
Archived input · per 1M tokens
$3.00/M
Launch Feb 24 2025 retired
Archived output · per 1M tokens
$15.00/M
Includes thinking tokens retired
Cached input · historical
$0.30/M
Cache 5min or 1h -90%
Effective · agentic blend
$1.92/M
92/8 split · 82% cache
§ 01 / TERMINAL
Run the numbers.
Archive calculator pre-loaded with Claude Sonnet 3.7's last published API rates. Use it to reconcile older spend or compare migrations; share the URL to share the calculation.
$ /mo
Workload split
Prompt cache hit rate
Tokens you can process
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Words equivalent (English)
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Effective rate
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§ 02 / SCENARIOS
Real-world presets.
SUPPORT ARCHIVE
Support agent ticket triage
$0.011/ticket
CODING AGENT
Repo-wide bug fix
$0.169/task
EXTENDED THINKING
Technical reasoning task
$0.126/task
LONG DOC ANALYSIS
Reading 100-page contracts
$0.645/doc
§ 03 / TAPE
Price history.
Input · $3/M
Output · $15/M
Cached · $0.30/M
FEB 24 Launch at $3/M · $15/MOCT 28 Deprecated; Anthropic recommended migrating to Claude Sonnet 4.6FEB 19 Retired from the Anthropic-operated Claude APIMAY 17 Archived on AI//COST with last published launch pricing
§ 04 / TOKENIZER
Paste text. See tokens. See cost.
Estimate · anthropic-bpe-estimate · ≈3.5 chars/token Auto-counts as you type
This is a chars-per-token approximation, not a real tokenizer. Actual tokens vary by language, code density, and tool-call overhead — counts are typically ±10–20% off for English prose, more for code or non-Latin scripts. For exact billing, use the vendor's official tokenizer.
Characters —
Words —
Tokens (estimated) —
Cost as input · uncached —
Cost as output · uncached —
Cost as cached input —
| Model | Input /M | Output /M | Effective blended | Context | Best for |
|---|---|---|---|---|---|
| Claude Sonnet 3.7 Current | $3.00 cache $0.30 | $15.00 | $1.92 archive · retired | 200K | Historical invoices · migration comparisons |
| Claude Sonnet 4.6 | $3.00 cache $0.30 | $15.00 | $1.92 official replacement | 1M | Production agents · coding |
| Claude Sonnet 4.5 | $3.00 cache $0.30 | $15.00 | $1.92 same list price | 200K | Stable Sonnet migrations |
| Claude Opus 4.7 | $5.00 cache $0.50 | $25.00 | $3.21 pricier | 1M | Frontier reasoning · hard code |
| Claude Haiku 4.5 | $1.00 cache $0.10 | $5.00 | $0.64 cheaper | 200K | Support · classification |
| GPT-5.4 | $2.50 cache $0.25 | $15.00 | $1.80 near parity | 270K | Affordable coding · tool use |
| Gemini 2.5 Pro | $1.25 cache $0.13 | $10.00 | $1.10 cheaper | 2M | Long-context document analysis |
| DeepSeek V4 Flash | $0.14 cache $0.00 | $0.28 | $0.05 deep budget | 1M | Bulk RAG · low-cost generation |
Frequently asked.
Archive pricing questions, with historical token math separated from current model availability.
Q · 01 Is Claude Sonnet 3.7 still available on the Anthropic API? +
No. Anthropic's model deprecations page lists
claude-3-7-sonnet-20250219 as retired on February 19, 2026. The recommended replacement is claude-sonnet-4-6, which keeps the same $3/M input and $15/M output headline price with a larger 1M context window.Q · 02 Why does this archive page still show a price? +
Anthropic's launch announcement stated that Claude Sonnet 3.7 used
$3/M input and $15/M output, including thinking tokens. We keep that historical price so older invoices, benchmark cost notes, and migration comparisons still have a stable reference. It is not a recommendation to route new production traffic to a retired model.Q · 03 How was the cached input price calculated? +
Anthropic's prompt caching rules price cache reads at
0.1x the base input price. With a $3/M base input rate, that gives $0.30/M for cache hits. Historical cache writes follow the same documented multipliers: $3.75/M for 5-minute writes and $6/M for 1-hour writes.Q · 04 Did extended thinking cost extra? +
No separate surcharge was published. Anthropic said standard and extended thinking modes had the same model price, with thinking tokens included in output billing. In practice, extended thinking could still raise total cost because it generated more billable output tokens at
$15/M.Q · 05 Was there a Batch API discount? +
While the model was active, the standard Anthropic Batch API discount was 50% for asynchronous workloads. Applying that rule to Claude Sonnet 3.7's archived list price gives
$1.50/M input and $7.50/M output. After retirement, new first-party batch jobs should target the replacement model instead.Q · 06 What should I migrate to? +
Use Claude Sonnet 4.6 for the closest migration path. It has the same
$3/M input, $15/M output, and $0.30/M cache-hit rates, but Anthropic lists it as active and gives it a 1M context window.Q · 07 Does regional pricing apply to this archived model? +
No first-party US-only inference multiplier is modeled here. Anthropic's current data-residency pricing applies to Claude Opus 4.6, Claude Sonnet 4.6, and later models; earlier models do not support the
inference_geo parameter. Bedrock and Vertex AI had their own platform-specific policies while 3.7 was available.Q · 08 How accurate is the tokenizer estimate? +
The live counter uses a
4.875 English characters-per-token estimate for Claude-class BPE tokenization. It is useful for planning historical spend, but actual invoices were based on Anthropic's server-side token counts. Code, tables, and non-English text can deviate from the English estimate.