Claude Sonnet 5.5 vs Kimi K2 0711
Pick up to 3 models · pricing, context and capabilities · simulate your product cost
Data updated on September 30, 2026· 217 models
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade.
- Reasoning estimated
- ▲
- Speed estimated
- Input
- Output
- Context
- ▲1 M tokens
- Max output
- ▲128 K
- Input, $ per 1M tokens
- $2.00
- Output, $ per 1M tokens
- $10.00
- Cache read, $ per 1M
- $0.200
- Batch (input / output)
- $1.00 / $5.00
- Tool calling
- Yes
- Released
- ▲09/28/2026
- Knowledge cutoff
- 2026-06
- API id
- anthropic/claude-sonnet-5.5
Kimi K2 Instruct is a large-scale Mixture-of-Experts (MoE) language model developed by Moonshot AI, featuring 1 trillion total parameters with 32 billion active per forward pass.
- Reasoning estimated
- Speed estimated
- Input
- Output
- Context
- 131 K tokens
- Max output
- 98 K
- Input, $ per 1M tokens
- ▲$0.570
- Output, $ per 1M tokens
- ▲$2.30
- Cache read, $ per 1M
- —
- Batch (input / output)
- —
- Tool calling
- Yes
- Released
- 07/11/2025
- Knowledge cutoff
- —
- API id
- moonshotai/kimi-k2
Which is the better API choice: Claude Sonnet 5.5 vs Kimi K2 0711?
- Kimi K2 0711: cheapest input (72% less than Claude Sonnet 5.5)
- Kimi K2 0711: cheapest output
- Claude Sonnet 5.5: largest context (1 M)
- Claude Sonnet 5.5: the newest (09/28/2026)
- Claude Sonnet 5.5: most reasoning (estimated)
Kimi K2 0711 costs 72% less on input and 77% less on output than Claude Sonnet 5.5 ($0.570 / $2.30 versus $2.00 / $10.00 per million tokens). Claude Sonnet 5.5 accepts more context (1 M). On capabilities, Claude Sonnet 5.5 accepts images; Claude Sonnet 5.5 has a reasoning mode. Claude Sonnet 5.5 offers a batch tier at half price for jobs that do not need an immediate answer.
What would your product cost?
Estimate the monthly cost with your app's real volume. List prices, no cache or batch discounts.
With Kimi K2 0711 you save $52.25 a month versus Claude Sonnet 5.5 (75% less).
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Paste your prompt: tokens and cost per model
Rough estimate (about 4 characters per token). Nothing is sent to any server.
Cost of sending it 1,000 times (input only)
- 1Kimi K2 0711 Moonshot$0.043
- 2Claude Sonnet 5.5 Anthropic$0.152
- 3Claude Sonnet 5 Anthropic$0.152
- 4Claude Opus 5.5 Anthropic$0.304
- 5Claude Opus 5 Anthropic$0.380
- 6Claude Opus 4.8 Anthropic$0.380
- 7Claude Fable 5.1 Anthropic$0.760
- 8Claude Fable 5 Anthropic$0.760
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Frequently asked questions
Which is the better API choice: Claude Sonnet 5.5 vs Kimi K2 0711?
Kimi K2 0711 costs 72% less on input and 77% less on output than Claude Sonnet 5.5 ($0.570 / $2.30 versus $2.00 / $10.00 per million tokens). Claude Sonnet 5.5 accepts more context (1 M). On capabilities, Claude Sonnet 5.5 accepts images; Claude Sonnet 5.5 has a reasoning mode. Claude Sonnet 5.5 offers a batch tier at half price for jobs that do not need an immediate answer.
Which is cheaper: Claude Sonnet 5.5 and Kimi K2 0711?
Kimi K2 0711 is cheaper: $0.570 per million input tokens and $2.30 per million output tokens, versus $2.00 / $10.00 for Claude Sonnet 5.5.
Which has more context: Claude Sonnet 5.5 and Kimi K2 0711?
Claude Sonnet 5.5 accepts 1 M tokens of context; Kimi K2 0711 accepts 131 K.
Which is newer: Claude Sonnet 5.5 and Kimi K2 0711?
Claude Sonnet 5.5 was released on 09/28/2026; Kimi K2 0711 on 07/11/2025.
What would 10,000 requests a month cost with Claude Sonnet 5.5 and Kimi K2 0711?
With 1,500 input and 400 output tokens per request: Claude Sonnet 5.5: $70.00; Kimi K2 0711: $17.75 a month, at list price.
Where do the prices come from and how often are they updated?
From the public catalogs of OpenRouter, models.dev and LiteLLM, which publish each provider's list prices. They sync once a day and the last update date is shown above the comparison.
What does price per million tokens mean?
It is what the provider charges per million tokens you send (input) or the model generates (output). A token is roughly 4 characters. Output almost always costs more than input.
Sources: OpenRouter, models.dev and LiteLLM. Prices in USD per million tokens, list price, no volume discounts. Prompt tokens are an estimate; each provider's tokenizer may differ.