What models are supported?

We support the latest and most capable models from all leading platforms, including OpenAI, Anthropic, Google, Meta, and DeepSeek. Our system is designed to integrate new models within hours of their public release.

How does the credit system work?

Each plan comes with a set amount of monthly credits. Credits are consumed based on the token usage of the models you interact with. We bill in micro-credits to ensure you only pay for what you actually use.

How does the credit system translate to tokens?

Credits map directly to raw token consumption. For example, $10 of credits corresponds to roughly 1 million input tokens of GPT-4o, or up to 60 million input tokens on our open-source models. View the Benchmarks section for detailed conversion rates.

Is there a free trial?

Yes! Every new account automatically starts with a 7-day Developer plan trial at no cost — 200 credits included. You get full access to multi-model comparison, API key support, and cost visibility. After 7 days, choose Personal ($10/mo) or Developer ($20/mo) to continue.

Can I cancel my subscription at any time?

Absolutely. You can manage your subscription through our billing portal and cancel at any time. Your credits will remains active until the end of your billing cycle.

GPT-5.6 Terra vs Grok-4.20 Reasoning — Price, Context, and Capability Compared

Verdict

GPT-5.6 Terra costs 1.5× more per blended million tokens than Grok-4.20 Reasoning. Grok-4.20 Reasoning has the larger context window (1,000,000 tokens). Default to Grok-4.20 Reasoning unless you specifically need GPT-5.6 Terra's edge.

Spec comparison

	GPT-5.6 Terra	Grok-4.20 Reasoning
Price (input)	$2.00/M	$2.00/M
Price (output)	$12.00/M	$6.00/M ✓
Blended price	$4.50/M	$3.00/M ✓
Context window	400,000 tokens	1,000,000 tokens ✓
Max output	128,000 tokens ✓	64,000 tokens
Modalities	text, vision	text, vision
Reasoning mode	Yes	Yes
Released	2026-06	2026-03
Speed	78 t/s ✓	52 t/s

Cost at scale (3:1 blended)

Tokens / month	GPT-5.6 Terra	Grok-4.20 Reasoning	Delta
1,000,000	$4.50	$3.00	$1.50 (1.5×)
10,000,000	$45.00	$30.00	$15.00 (1.5×)
100,000,000	$450.00	$300.00	$150.00 (1.5×)

Choose GPT-5.6 Terra if…

✓Balanced cost-to-intelligence ratio
✓Reasoning mode available on demand
✓Same 400K context as Sol
✓Everyday production workloads that need strong quality without Sol-tier pricing.

Choose Grok-4.20 Reasoning if…

✓State-of-the-art document analysis at 1M context
✓Dedicated reasoning mode
✓Strong vision understanding
✓Long-document analysis and problems that benefit from explicit reasoning.

Run this exact matchup right now

Send the same prompt to GPT-5.6 Terra and Grok-4.20 Reasoning side by side and see the outputs yourself.

Try GPT-5.6 Terra vs Grok-4.20 Reasoning Free

FAQ

Is GPT-5.6 Terra cheaper than Grok-4.20 Reasoning?

Grok-4.20 Reasoning is cheaper, at $3.00 per million blended tokens vs $4.50 for GPT-5.6 Terra.

Which has the bigger context window, GPT-5.6 Terra or Grok-4.20 Reasoning?

Grok-4.20 Reasoning has the larger context window: 1,000,000 tokens vs 400,000.

Can GPT-5.6 Terra replace Grok-4.20 Reasoning for coding?

Both are viable for coding. Balanced cost-to-intelligence ratio (GPT-5.6 Terra) vs State-of-the-art document analysis at 1M context (Grok-4.20 Reasoning) — pick based on which strength matters more for your workload.

Which is faster, GPT-5.6 Terra or Grok-4.20 Reasoning?

GPT-5.6 Terra is faster: 78 t/s vs 52 t/s, measured on our speed benchmarks.

GPT-5.6 Terra pricing Grok-4.20 Reasoning pricing vs Claude Opus 4.8 vs Grok 4.3 vs Gemini 3.1 Pro vs GPT-4 Turbo Premium model tests

Pricing verified 2026-04-06. Specs verified 2026-08-08.