Claude Sonnet 5.5 vs GPT-6.1 Sol Pro
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
GPT-6.1 Sol Pro is the same underlying model as GPT-6.1 Sol, served with reasoning.mode set to pro for higher-quality responses on complex tasks.
- Reasoning estimated
- ▲
- Speed estimated
- Input
- Output
- Context
- ▲1.1 M tokens
- Max output
- 128 K
- Input, $ per 1M tokens
- $2.00
- Output, $ per 1M tokens
- $10.00
- Cache read, $ per 1M
- $0.100
- Batch (input / output)
- $1.00 / $5.00
- Tool calling
- Yes
- Released
- ▲09/29/2026
- Knowledge cutoff
- —
- API id
- openai/gpt-6.1-sol-pro
Which is the better API choice: Claude Sonnet 5.5 vs GPT-6.1 Sol Pro?
- GPT-6.1 Sol Pro: largest context (1.1 M)
- GPT-6.1 Sol Pro: the newest (09/29/2026)
- GPT-6.1 Sol Pro: most reasoning (estimated)
- Claude Sonnet 5.5: the fastest (estimated)
Claude Sonnet 5.5 and GPT-6.1 Sol Pro cost the same ($2.00 input, $10.00 output per million tokens). GPT-6.1 Sol Pro accepts more context (1.1 M). Claude Sonnet 5.5 and GPT-6.1 Sol Pro 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.
They cost the same at this volume.
The 6 cheapest for this scenario (chat, last 12 months)
- 1Lyria 3 Pro Preview Google$0.00
- 2Lyria 3 Clip Preview Google$0.00
- 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
- 2GPT-6.1 Sol Pro OpenAI$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
- Claude Sonnet 5.5 vs GPT-6.1 Sol
- Claude Sonnet 5.5 vs Gemini 3.8 Flash
- Claude Sonnet 5.5 vs DeepSeek V4.1 Flash
- Claude Sonnet 5.5 vs Grok 4.7
- GPT-6.1 Sol vs Gemini 3.8 Flash
- GPT-6.1 Sol vs DeepSeek V4.1 Flash
- GPT-6.1 Sol vs Grok 4.7
- 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 GPT-6.1 Sol Pro?
Claude Sonnet 5.5 and GPT-6.1 Sol Pro cost the same ($2.00 input, $10.00 output per million tokens). GPT-6.1 Sol Pro accepts more context (1.1 M). Claude Sonnet 5.5 and GPT-6.1 Sol Pro offer a batch tier at half price for jobs that do not need an immediate answer.
Which is cheaper: Claude Sonnet 5.5 and GPT-6.1 Sol Pro?
Claude Sonnet 5.5 and GPT-6.1 Sol Pro cost the same: $2.00 per million input tokens and $10.00 output.
Which has more context: Claude Sonnet 5.5 and GPT-6.1 Sol Pro?
GPT-6.1 Sol Pro accepts 1.1 M tokens of context; Claude Sonnet 5.5 accepts 1 M.
Which is newer: Claude Sonnet 5.5 and GPT-6.1 Sol Pro?
GPT-6.1 Sol Pro was released on 09/29/2026; Claude Sonnet 5.5 on 09/28/2026.
What would 10,000 requests a month cost with Claude Sonnet 5.5 and GPT-6.1 Sol Pro?
With 1,500 input and 400 output tokens per request: Claude Sonnet 5.5: $70.00; GPT-6.1 Sol Pro: $70.00 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.