GPT-6.1 Terra vs Grok 4.6
GPT-6.1 Terra and Grok 4.6 are closely matched at 47.6 and 44.3 on the LLM Stats Score. GPT-6.1 Terra is 1.5x cheaper per token.
OpenAI · xAI · Updated for 2026
Which is better?
GPT-6.1 Terra and Grok 4.6 are closely matched on the overall LLM Stats Score at 47.6 and 44.3.
In the 2 individual benchmarks reported for both models, GPT-6.1 Terra wins 2; this is a narrower head-to-head signal than the composite indexes.
On price, GPT-6.1 Terra is roughly 1.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-6.1 Terra also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-6.1 Terra
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- cost matters — it's about 1.5x cheaper per token
- you process long inputs — it offers a 1,050,000 token context window
- you want the most recent training data — it shipped Oct 2026
Choose Grok 4.6
- you want predictable pricing at $2.00/M input and $6.00/M output
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
9 reported for GPT-6.1 Terra · 12 for Grok 4.6
GPT-6.1 Terra outperforms in 2 benchmarks (LifeSci Diamond (2026-11), Terminal-Bench 4.0), while Grok 4.6 is better at 0 benchmarks.
GPT-6.1 Terra significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-6.1 Terra ($1.00/1M tokens) is 2.0x cheaper than Grok 4.6 ($2.00/1M tokens).
For output processing, GPT-6.1 Terra ($5.00/1M tokens) is 1.2x cheaper than Grok 4.6 ($6.00/1M tokens).
In conclusion, Grok 4.6 is more expensive than GPT-6.1 Terra.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-6.1 Terra accepts 1,050,000 input tokens compared to Grok 4.6's 500,000 tokens. Only GPT-6.1 Terra specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
Both GPT-6.1 Terra and Grok 4.6 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-6.1 Terra
Grok 4.6
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-6.1 Terra was released on 2026-10-26, while Grok 4.6 was released on 2026-08-12.
GPT-6.1 Terra is 3 months newer than Grok 4.6.
Oct 26, 2026
1 weeks ago
2mo newerAug 12, 2026
2 months ago
Knowledge Cutoff
When training data ends
GPT-6.1 Terra has a knowledge cutoff of 2026-06-01, while Grok 4.6 has a cutoff of 2026-02-01.
GPT-6.1 Terra has more recent training data (up to 2026-06-01), making it potentially better informed about events through that date compared to Grok 4.6 (2026-02-01).
Jun 2026
4 mo newerFeb 2026
Provider Availability
GPT-6.1 Terra is available from OpenAI. Grok 4.6 is available from xAI.
GPT-6.1 Terra
Grok 4.6
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-6.1 Terra and Grok 4.6 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-6.1 Terra vs Grok 4.6.