DeepSeek V3.1 Terminus vs MiniMax M2 vs Grok 4.20
DeepSeek V3.1 Terminus at $0.310 in and $1.15 out, MiniMax M2 at $0.293 in and $1.17 out, and Grok 4.20 at $1.44 in and $2.88 out — per million tokens, from the same wallet.
DeepSeek V3.1 Terminus
DeepSeek
0.25¢
for a client proposal
$0.310 in · $1.15 out / 1M
131K context · released September 2025
MiniMax M2
MiniMax
0.24¢
for a client proposal
$0.293 in · $1.17 out / 1M
205K context · released October 2025
Grok 4.20
xAI
0.95¢
for a client proposal
$1.44 in · $2.88 out / 1M
2M context · released 4 months ago
Asking all three at once — identical prompt, identical context — costs about 1.4¢ for a typical client proposal.
At a glance
- Cheapest input: MiniMax M2 at $0.293 per million tokens.
- Cheapest output: DeepSeek V3.1 Terminus at $1.15 per million tokens.
- Largest context: Grok 4.20 at 2M tokens — about 2,900 pages.
Cost per task
Estimated totals at the rates above. Solid bar is input, lighter bar is output.
Quick code fix
2K in · 500 outDraft a client proposal from notes
5K in · 800 outContext-heavy session (Alyph workspace)
155K in · 4K outAnalyze a 50-page legal contract
35K in · 1K outLarge architecture refactor
250K in · 3K outLong-context rate applied at this input size.
Solid part of each bar is input tokens, the lighter part is output. Models that don’t fit a task are marked instead of priced.
Cost vs Token Amount
Drag the slider to adjust the split between input and output workload.
Adjust the ratio slider to change how output tokens influence the final price for equivalent workloads.
Pricing
Specs
Try it with real numbers
2K tokens in · 500 tokens out.
All 3, same prompt and context: 0.67¢. That is the entire cost of the comparison.
Your $5 welcome credit covers about 748 of these.
Which should you pick?
For long documents, Grok 4.20 has the largest context window here — 2M tokens.
On price, MiniMax M2 is the cheapest of the three on a typical task, at about 0.24¢.
For images or files, Grok 4.20 can read them directly; DeepSeek V3.1 Terminus and MiniMax M2 are text-only.
Or don’t pick. Send the identical prompt to all three, read the answers side by side, and keep the winner. How to run a fair bake-off →
Questions, answered
Which is cheapest — DeepSeek V3.1 Terminus, MiniMax M2, or Grok 4.20?
Which has the largest context window?
Can I run DeepSeek V3.1 Terminus, MiniMax M2, and Grok 4.20 side by side on Alyph?
Ask all three at once
Identical prompt, identical context, answers side by side — about 1.4¢ for a typical client proposal. Free to start, with $5 of credit.