AI model comparison
GPT-6.1 Terra vs Gemini 4 Argon
Side by side comparison of GPT-6.1 Terra and Gemini 4 Argon 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
Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents.
- 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
Gemini 4 Argon
52.6 vs 48.1 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 Terra48.1Gemini 4 Argon52.6Coding index
GPT-6.1 TerraNot availableGemini 4 ArgonNot availableAgentic index
GPT-6.1 TerraNot availableGemini 4 ArgonNot availablePricing
GPT-6.1 Terra vs Gemini 4 Argon API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | GPT-6.1 Terra | Gemini 4 Argon |
|---|---|---|
| Input tokensPer 1M tokens | $1 | $2 |
| Output tokensPer 1M tokens | $5 | $10 |
| Cached input (read)Per 1M tokens | $0.05 | $0.10 |
| Cache writePer 1M tokens | $1.25 | $0.19 |
| 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 | $0.014 |
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$4.50Gemini 4 Argon$9Coding task
30K in, 4K out
GPT-6.1 Terra$50$21.50 cachedGemini 4 Argon$100$43 cachedLong document summary
150K in, 2K out
GPT-6.1 Terra$160$17.50 cachedGemini 4 Argon$320$35 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 | Gemini 4 Argon |
|---|---|---|
| Context window | 1.05M tokens | 1.05M tokens |
| Max output | 128K tokens | 944K tokens |
| Input types | File, Image, Text | Audio, File, Image, Text, Video |
| Output types | Text | Text |
| Reasoning effort levels | Max, Extra high, High, Medium, Low, None | High, Medium, Low |
| Default reasoning effort | Medium | Medium |
| Release date | October 26, 2026 | October 13, 2026 |
Features
Supported features
API features available for each model.
| Metric | GPT-6.1 Terra | Gemini 4 Argon |
|---|---|---|
| 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.
Gemini 4 ArgonView full model details- Gemini 4 Argon vs Claude Opus 5.5
- Gemini 4 Argon vs Claude Sonnet 5.5
- Gemini 4 Argon vs Kimi K3.1 Pro
- Gemini 4 Argon vs Claude Fable 5.1
- Gemini 4 Argon vs GPT-6 Astra
- Gemini 4 Argon vs GPT-6.1 Sol
- Gemini 4 Argon vs Claude Opus 5
- Gemini 4 Argon vs Claude Fable 5
- Gemini 4 Argon vs Muse Spark 1.3
- Gemini 4 Argon vs GPT-6 Sol
- Gemini 4 Argon vs GPT-5.6 Sol
- Gemini 4 Argon vs Grok 4.7
- Gemini 4 Argon vs DeepSeek V4.1 Flash 1017
- Gemini 4 Argon vs DeepSeek V4.1 Flash
- Gemini 4 Argon vs GLM 5.3 Flash
- Gemini 4 Argon vs Hy4 preview
- Gemini 4 Argon vs GPT-6 Luna
- Gemini 4 Argon vs Muse Wonder
Our take
GPT-6.1 Terra is 2x cheaper for a typical chat. Gemini 4 Argon scores higher on the Artificial Analysis Intelligence Index (52.6 vs 48.1). 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 Gemini 4 Argon 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 Gemini 4 Argon costs $2 per 1M input tokens and $10 per 1M output tokens.
Which has a bigger context window, GPT-6.1 Terra or Gemini 4 Argon?
GPT-6.1 Terra supports up to 1.05M tokens of context, compared with 1.05M for Gemini 4 Argon.
Is GPT-6.1 Terra smarter than Gemini 4 Argon?
On the Artificial Analysis Intelligence Index, GPT-6.1 Terra scores 48.1 and Gemini 4 Argon scores 52.6, putting Gemini 4 Argon 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 Gemini 4 Argon at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see GPT-6.1 Terra and Gemini 4 Argon answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to GPT-6.1 Terra and Gemini 4 Argon at the same time. Compare the answers side by side and keep the best one.