AI model comparison
GPT-6.1 Terra vs Kimi K3.1 Pro
Side by side comparison of GPT-6.1 Terra and Kimi K3.1 Pro on pricing, benchmark scores, context window, and more.
GPT-6.1 Terra is the mid-tier model in OpenAI's GPT-6.1 series, priced below GPT-6.1 Sol.
- Input / 1M
- $1
- Output / 1M
- $5
- Context
- 1.05M
Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model and a post-trained successor to Kimi K3, with a 1M-token context window.
- Input / 1M
- $2
- Output / 1M
- $10
- Context
- 1.05M
Comparing image generators? Compare image models
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
GPT-6.1 Terra
2x cheaper for a typical chat
Higher intelligence score
GPT-6.1 Terra
51 vs 46 on Artificial Analysis
Larger context window
GPT-6.1 Terra
1.05M vs 1.05M tokens
Newer release
GPT-6.1 Terra
Released October 26, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
GPT-6.1 Terra51Coding index
GPT-6.1 TerraNot availableAgentic index
GPT-6.1 TerraNot availablePricing
GPT-6.1 Terra vs Kimi K3.1 Pro API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | GPT-6.1 Terra | |
|---|---|---|
| Input tokensPer 1M tokens | $1 | $2 |
| Output tokensPer 1M tokens | $5 | $10 |
| Cached input (read)Per 1M tokens | $0.05 | $0.20 |
| Cache writePer 1M tokens | $1.25 | Not available |
| Long-context pricingPer 1M tokens, for very long prompts | $2 in / $7.50 out above 272K | Same rate at any length |
| Web searchPer request | $0.01 | Not available |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
GPT-6.1 Terra$4.50Coding task
30K in, 4K out
GPT-6.1 Terra$50$21.50 cachedLong document summary
150K in, 2K out
GPT-6.1 Terra$160$17.50 cachedSpecs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | GPT-6.1 Terra | |
|---|---|---|
| Context window | 1.05M tokens | 1.05M tokens |
| Max output | 128K tokens | 944K tokens |
| Input types | File, Image, Text | Image, Text, Video |
| Output types | Text | Text |
| Reasoning effort levels | Max, Extra high, High, Medium, Low, None | Max, High, Low, None |
| Default reasoning effort | Medium | Max |
| Release date | October 26, 2026 | October 23, 2026 |
Features
Supported features
API features available for each model.
| Metric | GPT-6.1 Terra | |
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Not supported | Not supported |
| Stop sequences | Not supported | Supported |
| Deterministic seed | Supported | Not supported |
| Verbosity control | Supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
GPT-6.1 TerraView full model details- GPT-6.1 Terra vs Claude Opus 5.5
- GPT-6.1 Terra vs GPT-6 Astra
- GPT-6.1 Terra vs GPT-6.1 Sol
- GPT-6.1 Terra vs Claude Sonnet 5.5
- GPT-6.1 Terra vs Gemini 4 Argon
- GPT-6.1 Terra vs Claude Fable 5.1
- GPT-6.1 Terra vs Muse Spark 1.3
- GPT-6.1 Terra vs Claude Haiku 5.5
- GPT-6.1 Terra vs GPT-6 Luna
- GPT-6.1 Terra vs DeepSeek V4.1 Flash 1017
- GPT-6.1 Terra vs DeepSeek V4.1 Flash
- GPT-6.1 Terra vs GLM 5.3 Flash
- GPT-6.1 Terra vs Hy4 preview
- GPT-6.1 Terra vs GLM 5.2
- GPT-6.1 Terra vs GPT-6 Sol
- GPT-6.1 Terra vs GPT-5.6 Terra
- Kimi K3.1 Pro vs Claude Opus 5.5
- Kimi K3.1 Pro vs GPT-6 Astra
- Kimi K3.1 Pro vs GPT-6.1 Sol
- Kimi K3.1 Pro vs Claude Sonnet 5.5
- Kimi K3.1 Pro vs Gemini 4 Argon
- Kimi K3.1 Pro vs Claude Fable 5.1
- Kimi K3.1 Pro vs Muse Spark 1.3
- Kimi K3.1 Pro vs Claude Haiku 5.5
- Kimi K3.1 Pro vs Kimi K3
- Kimi K3.1 Pro vs GLM 5.2
- Kimi K3.1 Pro vs Claude Sonnet 5
- Kimi K3.1 Pro vs GPT-6 Sol
- Kimi K3.1 Pro vs Claude Sonnet 4.5
- Kimi K3.1 Pro vs Claude Sonnet 4.6
- Kimi K3.1 Pro vs GPT-5.6 Terra
- Kimi K3.1 Pro vs Grok 4.6
- Kimi K3.1 Pro vs Muse Wonder
Our take
GPT-6.1 Terra is 2x cheaper for a typical chat. GPT-6.1 Terra scores higher on the Artificial Analysis Intelligence Index (51 vs 46). GPT-6.1 Terra has the larger context window (1.05M vs 1.05M tokens). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is GPT-6.1 Terra or Kimi K3.1 Pro cheaper?
GPT-6.1 Terra is cheaper for a typical chat (2K input tokens and 500 output tokens). GPT-6.1 Terra costs $1 per 1M input tokens and $5 per 1M output tokens, while Kimi K3.1 Pro costs $2 per 1M input tokens and $10 per 1M output tokens.
Which has a bigger context window, GPT-6.1 Terra or Kimi K3.1 Pro?
GPT-6.1 Terra supports up to 1.05M tokens of context, compared with 1.05M for Kimi K3.1 Pro.
Is GPT-6.1 Terra smarter than Kimi K3.1 Pro?
On the Artificial Analysis Intelligence Index, GPT-6.1 Terra scores 51 and Kimi K3.1 Pro scores 46, putting GPT-6.1 Terra ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use GPT-6.1 Terra and Kimi K3.1 Pro at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see GPT-6.1 Terra and Kimi K3.1 Pro answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to GPT-6.1 Terra and Kimi K3.1 Pro at the same time. Compare the answers side by side and keep the best one.