Which is cheaper, Claude Opus 5.5 and MiniMax M3.1 Flash?

MiniMax M3.1 Flash has the lowest input price. Per 1M input tokens: Claude Opus 5.5 from $4.00 and MiniMax M3.1 Flash from $0.15.

Which is smarter, Claude Opus 5.5 and MiniMax M3.1 Flash?

Claude Opus 5.5 scores highest on the Artificial Analysis Intelligence Index: Claude Opus 5.5 58.4 and MiniMax M3.1 Flash 28.9.

Can I switch between Claude Opus 5.5 and MiniMax M3.1 Flash 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 (anthropic/claude-opus-5.5, minimax/minimax-m3.1-flash).

Claude Opus 5.5 vs MiniMax M3.1 Flash

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

Estimate monthly cost for these models

Claude Opus 5.5 Anthropicanthropic/claude-opus-5.5

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

Creator

Anthropic

Minimax

Released

Sep 22, 2026

Oct 19, 2026

Context window

Max output

128K

524K

Input / 1MLowest provider price

$4.00

$0.15

Output / 1MLowest provider price

$20.00

$0.60

Providers

IntelligenceArtificial Analysis index

58.4

28.9

Accepts

Text, Image, Files

Text, Image, Video

Produces

Text

Tool calling

Yes

Structured output

Yes

Reasoning

Yes

Claude Opus 5.5 vs MiniMax M3.1 Flash: summary

Claude Opus 5.5 and MiniMax M3.1 Flash are both available through FastRouter's OpenAI-compatible API, so switching between them is a change of model id, not a new integration.

Claude Opus 5.5, from Anthropic, has a 1,000,000-token context window, costs from $4.00/1M input and $20.00/1M output tokens across 3 providers and scores 58.4 on the Artificial Analysis Intelligence Index.

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.

MiniMax M3.1 Flash is the cheapest on input, 27× cheaper than the next model and Claude Opus 5.5 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="anthropic/claude-opus-5.5", messages=[...]) # or client.chat.completions.create(model="minimax/minimax-m3.1-flash", messages=[...])

Full API docs

Frequently asked questions

More comparisons

Benchmark scores sourced from ArtificialAnalysis