Claude Sonnet 5.5 vs Gemini 3.1 Pro Preview
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
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows.
- Reasoning estimated
- ▲
- Speed estimated
- ▲
- Input
- Output
- Context
- ▲1 M tokens
- Max output
- 66 K
- Input, $ per 1M tokens
- $2.00
- Output, $ per 1M tokens
- $12.00
- Cache read, $ per 1M
- $0.200
- Batch (input / output)
- $1.00 / $6.00
- Tool calling
- Yes
- Released
- 02/19/2026
- Knowledge cutoff
- 2025-01
- API id
- google/gemini-3.1-pro-preview
Which is the better API choice: Claude Sonnet 5.5 vs Gemini 3.1 Pro Preview?
- Claude Sonnet 5.5: cheapest output
- Gemini 3.1 Pro Preview: largest context (1 M)
- Claude Sonnet 5.5: the newest (09/28/2026)
- Gemini 3.1 Pro Preview: most reasoning (estimated)
- Gemini 3.1 Pro Preview: the fastest (estimated)
Claude Sonnet 5.5 costs 0% less on input and 17% less on output than Gemini 3.1 Pro Preview ($2.00 / $10.00 versus $2.00 / $12.00 per million tokens). Gemini 3.1 Pro Preview accepts more context (1 M). On capabilities, only Gemini 3.1 Pro Preview accepts audio. Claude Sonnet 5.5 and Gemini 3.1 Pro Preview offer 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 Claude Sonnet 5.5 you save $8.00 a month versus Gemini 3.1 Pro Preview (10% less).
The 6 cheapest for this scenario (chat, last 12 months)
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- 3Qwen3.7 Flash Qwen$0.97
- 4DeepSeek V4 Flash 0731 DeepSeek$1.55
- 5Ministral 3 3B 2512 Mistral$1.90
- 6Qwen3.5-Flash Qwen$2.02
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)
- 1Claude Sonnet 5.5 Anthropic$0.152
- 2Gemini 3.1 Pro Preview Google$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
Popular comparisons
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- Gemini 3.8 Flash vs DeepSeek V4.1 Flash
- Gemini 3.8 Flash vs Grok 4.7
- DeepSeek V4.1 Flash vs Grok 4.7
Frequently asked questions
Which is the better API choice: Claude Sonnet 5.5 vs Gemini 3.1 Pro Preview?
Claude Sonnet 5.5 costs 0% less on input and 17% less on output than Gemini 3.1 Pro Preview ($2.00 / $10.00 versus $2.00 / $12.00 per million tokens). Gemini 3.1 Pro Preview accepts more context (1 M). On capabilities, only Gemini 3.1 Pro Preview accepts audio. Claude Sonnet 5.5 and Gemini 3.1 Pro Preview offer a batch tier at half price for jobs that do not need an immediate answer.
Which is cheaper: Claude Sonnet 5.5 and Gemini 3.1 Pro Preview?
Claude Sonnet 5.5 is cheaper: $2.00 per million input tokens and $10.00 per million output tokens, versus $2.00 / $12.00 for Gemini 3.1 Pro Preview.
Which has more context: Claude Sonnet 5.5 and Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview accepts 1 M tokens of context; Claude Sonnet 5.5 accepts 1 M.
Which is newer: Claude Sonnet 5.5 and Gemini 3.1 Pro Preview?
Claude Sonnet 5.5 was released on 09/28/2026; Gemini 3.1 Pro Preview on 02/19/2026.
What would 10,000 requests a month cost with Claude Sonnet 5.5 and Gemini 3.1 Pro Preview?
With 1,500 input and 400 output tokens per request: Claude Sonnet 5.5: $70.00; Gemini 3.1 Pro Preview: $78.00 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.