Claude Sonnet 4.5 vs GPT-6.1 Terra
Pick up to 3 models · pricing, context and capabilities · simulate your product cost
Data updated on November 14, 2026· 230 models
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows.
- Reasoning estimated
- Speed estimated
- Input
- Output
- Context
- 1 M tokens
- Max output
- 64 K
- Input, $ per 1M tokens
- $3.00
- Output, $ per 1M tokens
- $15.00
- Cache read, $ per 1M
- $0.300
- Batch (input / output)
- $1.50 / $7.50
- Tool calling
- Yes
- Released
- 09/29/2025
- Knowledge cutoff
- —
- API id
- anthropic/claude-sonnet-4.5
GPT-6.1 Terra is the mid-tier model in OpenAI's GPT-6.1 series, priced below GPT-6.1 Sol.
- Reasoning estimated
- Speed estimated
- Input
- Output
- Context
- ▲1.1 M tokens
- Max output
- ▲128 K
- Input, $ per 1M tokens
- ▲$1.00
- Output, $ per 1M tokens
- ▲$5.00
- Cache read, $ per 1M
- $0.050
- Batch (input / output)
- $0.500 / $2.50
- Tool calling
- Yes
- Released
- ▲10/26/2026
- Knowledge cutoff
- 2026-06-01
- API id
- openai/gpt-6.1-terra
Which is the better API choice: Claude Sonnet 4.5 vs GPT-6.1 Terra?
- GPT-6.1 Terra: cheapest input (67% less than Claude Sonnet 4.5)
- GPT-6.1 Terra: cheapest output
- GPT-6.1 Terra: largest context (1.1 M)
- GPT-6.1 Terra: the newest (10/26/2026)
GPT-6.1 Terra costs 67% less on input and 67% less on output than Claude Sonnet 4.5 ($1.00 / $5.00 versus $3.00 / $15.00 per million tokens). GPT-6.1 Terra accepts more context (1.1 M). Claude Sonnet 4.5 and GPT-6.1 Terra 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 GPT-6.1 Terra you save $70.00 a month versus Claude Sonnet 4.5 (67% 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)
- 1Claude Haiku 5.5 Anthropic$0.008
- 2GPT-6.1 Terra OpenAI$0.076
- 3Claude Sonnet 5.5 Anthropic$0.152
- 4Claude Sonnet 4.5 Anthropic$0.228
- 5Claude Opus 5.5 Anthropic$0.304
- 6Claude Opus 5 Anthropic$0.380
- 7Claude Fable 5.2 Anthropic$0.608
- 8Claude Fable 5.1 Anthropic$0.760
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See allFrequently asked questions
Which is the better API choice: Claude Sonnet 4.5 vs GPT-6.1 Terra?
GPT-6.1 Terra costs 67% less on input and 67% less on output than Claude Sonnet 4.5 ($1.00 / $5.00 versus $3.00 / $15.00 per million tokens). GPT-6.1 Terra accepts more context (1.1 M). Claude Sonnet 4.5 and GPT-6.1 Terra offer a batch tier at half price for jobs that do not need an immediate answer.
Which is cheaper: Claude Sonnet 4.5 and GPT-6.1 Terra?
GPT-6.1 Terra is cheaper: $1.00 per million input tokens and $5.00 per million output tokens, versus $3.00 / $15.00 for Claude Sonnet 4.5.
Which has more context: Claude Sonnet 4.5 and GPT-6.1 Terra?
GPT-6.1 Terra accepts 1.1 M tokens of context; Claude Sonnet 4.5 accepts 1 M.
Which is newer: Claude Sonnet 4.5 and GPT-6.1 Terra?
GPT-6.1 Terra was released on 10/26/2026; Claude Sonnet 4.5 on 09/29/2025.
What would 10,000 requests a month cost with Claude Sonnet 4.5 and GPT-6.1 Terra?
With 1,500 input and 400 output tokens per request: Claude Sonnet 4.5: $105.00; GPT-6.1 Terra: $35.00 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.