AI model comparison
GPT-6.1 Terra vs Hy4 preview
Side by side comparison of GPT-6.1 Terra and Hy4 preview 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
Tencent: Hy4 preview is a mixture-of-experts model from Tencent, with 49B active parameters out of 770B total.
- Input / 1M
- $0.83
- Output / 1M
- $2.50
- 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
Hy4 preview
1.5x cheaper for a typical chat
Higher intelligence score
Not available
Not enough benchmark data
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 Hy4 preview API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | GPT-6.1 Terra | |
|---|---|---|
| Input tokensPer 1M tokens | $1 | $0.83 |
| Output tokensPer 1M tokens | $5 | $2.50 |
| Cached input (read)Per 1M tokens | $0.05 | $0.04 |
| 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 | 64K tokens |
| Input types | File, Image, Text | Text |
| Output types | Text | Text |
| Reasoning effort levels | Max, Extra high, High, Medium, Low, None | High, Low, None |
| Default reasoning effort | Medium | High |
| Release date | October 26, 2026 | August 28, 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 | Supported |
| Stop sequences | Not supported | Supported |
| Deterministic seed | Supported | 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 Kimi K3.1 Pro
- 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 GLM 5.2
- GPT-6.1 Terra vs GPT-6 Sol
- GPT-6.1 Terra vs GPT-5.6 Terra
- Hy4 preview vs DeepSeek V4.1 Flash 1017
- Hy4 preview vs DeepSeek V4.1 Flash
- Hy4 preview vs GLM 5.3 Flash
- Hy4 preview vs GPT-6 Luna
- Hy4 preview vs Claude Opus 5.5
- Hy4 preview vs GLM 5.3
- Hy4 preview vs Step 5 Preview
- Hy4 preview vs MiMo-V2.6-Flash
- Hy4 preview vs DeepSeek V4 Flash 0731
- Hy4 preview vs Hy3
- Hy4 preview vs GPT-6.1 Sol
- Hy4 preview vs Claude Sonnet 5.5
- Hy4 preview vs GPT-5.6 Luna
- Hy4 preview vs Gemini 3.8 Flash
- Hy4 preview vs GLM 5.2
- Hy4 preview vs DeepSeek V4 Pro 0813
- Hy4 preview vs Gemini 4 Argon
- Hy4 preview vs Gemini 3 Flash Preview
- Hy4 preview vs DeepSeek V4 Pro 0423
- Hy4 preview vs Gemini 3.1 Flash Lite
- Hy4 preview vs Grok 4.7
- Hy4 preview vs GPT-6 Astra
- Hy4 preview vs Gemini 3.7 Flash
- Hy4 preview vs Step 3.7 Flash
- Hy4 preview vs Gemini 2.5 Flash
- Hy4 preview vs Gemini 3.5 Flash Lite
- Hy4 preview vs Qwen3.8 Max (0902)
- Hy4 preview vs Claude Haiku 4.5
- Hy4 preview vs GLM 5.3 FlashX
- Hy4 preview vs Qwen3.6 35B A3B
- Hy4 preview vs Grok 4.6
- Hy4 preview vs Muse Spark 1.3
- Hy4 preview vs GPT-5.6 Luna Pro
- Hy4 preview vs MiMo-V2.5
- Hy4 preview vs Nemotron 3 Ultra
- Hy4 preview vs MiMo-V2.5-Pro
- Hy4 preview vs Muse Glimmer 30B
- Hy4 preview vs Inkling
- Hy4 preview vs Command A+
Our take
Hy4 preview is 1.5x cheaper for a typical chat. 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 Hy4 preview cheaper?
Hy4 preview is cheaper for a typical chat (2K input tokens and 500 output tokens). Hy4 preview costs $0.83 per 1M input tokens and $2.50 per 1M output tokens, while GPT-6.1 Terra costs $1 per 1M input tokens and $5 per 1M output tokens.
Which has a bigger context window, GPT-6.1 Terra or Hy4 preview?
GPT-6.1 Terra supports up to 1.05M tokens of context, compared with 1.05M for Hy4 preview.
Can I use GPT-6.1 Terra and Hy4 preview at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see GPT-6.1 Terra and Hy4 preview answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to GPT-6.1 Terra and Hy4 preview at the same time. Compare the answers side by side and keep the best one.