GPT-6.1 Terra vs Grok 4.20
Pick up to 3 models · pricing, context and capabilities · simulate your product cost
Data updated on November 14, 2026· 230 models
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
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities.
- Reasoning estimated
- Speed estimated
- Input
- Output
- Context
- ▲2 M tokens
- Max output
- ▲1.8 M
- Input, $ per 1M tokens
- $1.25
- Output, $ per 1M tokens
- ▲$2.50
- Cache read, $ per 1M
- $0.200
- Batch (input / output)
- —
- Tool calling
- Yes
- Released
- 03/31/2026
- Knowledge cutoff
- —
- API id
- x-ai/grok-4.20
Which is the better API choice: GPT-6.1 Terra vs Grok 4.20?
- GPT-6.1 Terra: cheapest input (20% less than Grok 4.20)
- Grok 4.20: cheapest output
- Grok 4.20: largest context (2 M)
- GPT-6.1 Terra: the newest (10/26/2026)
Pricing is split: GPT-6.1 Terra wins on input and Grok 4.20 wins on output. Grok 4.20 accepts more context (2 M). GPT-6.1 Terra 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 Grok 4.20 you save $6.25 a month versus GPT-6.1 Terra (18% less).
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- 4DeepSeek V4.1 Flash DeepSeek$1.57
- 5DeepSeek V4 Flash 0731 DeepSeek$1.85
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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
- 3Grok 4.20 xAI$0.095
- 4Claude Sonnet 5.5 Anthropic$0.152
- 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: GPT-6.1 Terra vs Grok 4.20?
Pricing is split: GPT-6.1 Terra wins on input and Grok 4.20 wins on output. Grok 4.20 accepts more context (2 M). GPT-6.1 Terra offers a batch tier at half price for jobs that do not need an immediate answer.
Which is cheaper: GPT-6.1 Terra and Grok 4.20?
GPT-6.1 Terra is cheaper: $1.00 per million input tokens and $5.00 per million output tokens, versus $1.25 / $2.50 for Grok 4.20.
Which has more context: GPT-6.1 Terra and Grok 4.20?
Grok 4.20 accepts 2 M tokens of context; GPT-6.1 Terra accepts 1.1 M.
Which is newer: GPT-6.1 Terra and Grok 4.20?
GPT-6.1 Terra was released on 10/26/2026; Grok 4.20 on 03/31/2026.
What would 10,000 requests a month cost with GPT-6.1 Terra and Grok 4.20?
With 1,500 input and 400 output tokens per request: GPT-6.1 Terra: $35.00; Grok 4.20: $28.75 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.