Claude Sonnet 5.5
Anthropic's 28 Sep 2026 mid-tier model, at $2/$10 per 1M tokens with cache reads at $0.20 (0.1x input). Artificial Analysis Intelligence Index v4.3.2 puts it at 56 at max effort, 52 at xhigh, 47 at high and 41 at medium — above Claude Fable 5.1 and GPT-6 Astra (both 53) at max, at a fifth of their per-token price. The cost-per-task figures are the counterweight: $7.60 per Index task at max (410M output tokens against an 81M median, flagged 'very verbose'), $2.74 at xhigh and $1.08 at high, so the effort setting matters more than the sticker price. Anthropic says it costs up to 30% less per task than Sonnet 5, runs 30%+ faster, and batches tool calls more; that comparison is not visible in Artificial Analysis's row for this model. Per-token pricing is unchanged from Sonnet 5 per Anthropic's pricing table. 1M context at standard pricing, 128K maximum output (300K on the Batch API with a beta header). Thinking is adaptive with a default effort of high and a new lowest setting, between_tools. The Batch API halves the rate to $1/$5. Fast mode is not offered.
1M
tokens
128K
tokens
$2
per 1M tokens
$10
per 1M tokens
—
tokens/sec
Sep 2026
2026-09-28
$6.00
per 1M tokens
16.5
quality per $
Capabilities
Benchmarks
Price vs Quality
Context Window in Context
- ▸ Claude Sonnet 5.51M
- GPT-4.11M
- Gemini 2.5 Pro1M
- Gemini 2.0 Flash1M
- Llama 4 Maverick1M
- GPT-5.51M
- GPT-5.5 Pro1M
- Claude Opus 4.71M
ليس على بوابتنا بعد
لا تملك Swfte Connect مفتاحًا لـ Claude Sonnet 5.5، لذا لا يوجد ما يمكن تشغيله هنا. أضف مفتاح المزوّد الخاص بك ثم استدعِ النموذج بالواجهة نفسها المستخدمة مع بقية نماذج هذا الدليل.
curl https://api.swfte.com/agents/v2/gateway/chat/completions \
-H "Authorization: Bearer $SWFTE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "anthropic:claude-sonnet-5-5",
"messages": [{"role": "user", "content": "Hello"}]
}'About Claude Sonnet 5.5
Claude Sonnet 5.5 is a balanced AI model by Anthropic, released on September 28, 2026. It supports a context window of 1000K tokens and can generate up to 128K output tokens.
At $2 per million input tokens and $10 per million output tokens, its blended cost of $6.00/1M tokens places it in the premium pricing tier. Its value score of 16.5 reflects the balance of quality and cost.
Using Claude Sonnet 5.5 with Swfte
Access Claude Sonnet 5.5 through Swfte Connect, our unified LLM gateway. Connect gives you a single API for 50+ models, with automatic routing, cost optimization, and fallback handling. You can also try Claude Sonnet 5.5 in our AI Playground before integrating.