Which is cheaper, MiniMax M3.1 Flash and GPT-6.1 Terra?

MiniMax M3.1 Flash has the lowest input price. Per 1M input tokens: MiniMax M3.1 Flash from $0.15 and GPT-6.1 Terra from $1.00.

Which has the larger context window, MiniMax M3.1 Flash and GPT-6.1 Terra?

GPT-6.1 Terra has the largest context window: MiniMax M3.1 Flash 1,000,000 tokens and GPT-6.1 Terra 1,050,000 tokens.

Can I switch between MiniMax M3.1 Flash and GPT-6.1 Terra without changing my code?

Yes. All of them are served through FastRouter's OpenAI-compatible API, so switching is a change of the model parameter (minimax/minimax-m3.1-flash, openai/gpt-6.1-terra).

MiniMax M3.1 Flash vs GPT-6.1 Terra

Side-by-side pricing per provider, context window, benchmark scores and speed, all on one OpenAI-compatible API.

Estimate monthly cost for these models

MiniMax M3.1 Flash Minimaxminimax/minimax-m3.1-flash

GPT-6.1 Terra OpenAIopenai/gpt-6.1-terra

Creator

Minimax

OpenAI

Released

Oct 19, 2026

Oct 26, 2026

Context window

1.05M

Max output

524K

128K

Input / 1MLowest provider price

$0.15

$1.00

Output / 1MLowest provider price

$0.60

$5.00

Providers

IntelligenceArtificial Analysis index

28.9

51.0

Accepts

Text, Image, Video

Text, Image, Files

Produces

Text

Tool calling

Yes

Structured output

Yes

Reasoning

Yes

MiniMax M3.1 Flash vs GPT-6.1 Terra: summary

MiniMax M3.1 Flash and GPT-6.1 Terra are both available through FastRouter's OpenAI-compatible API, so switching between them is a change of model id, not a new integration.

MiniMax M3.1 Flash, from Minimax, has a 1,000,000-token context window, costs $0.15/1M input and $0.60/1M output tokens and scores 28.9 on the Artificial Analysis Intelligence Index.

GPT-6.1 Terra, from OpenAI, has a 1,050,000-token context window, costs $1.00/1M input and $5.00/1M output tokens and scores 51.0 on the Artificial Analysis Intelligence Index.

MiniMax M3.1 Flash is the cheapest on input, 6.7× cheaper than the next model, GPT-6.1 Terra has the largest context window and GPT-6.1 Terra scores highest for intelligence.

Switch with one line

client = OpenAI(base_url="https://api.fastrouter.ai/api/v1", api_key="<FASTROUTER_API_KEY>") client.chat.completions.create(model="minimax/minimax-m3.1-flash", messages=[...]) # or client.chat.completions.create(model="openai/gpt-6.1-terra", messages=[...])

Full API docs

Frequently asked questions

More comparisons

Benchmark scores sourced from ArtificialAnalysis