GLM-4.5 vs Seed 2.1 Turbo
Prices checked
GLM-4.5 and Seed 2.1 Turbo split the 5 rounds this table counts: the maker's two prices, the cheapest price, the maker's blended price and context. The weighting you pick decides the rest.
Z.aiGLM-4.5
131k context · tool calling · open weights
$0.35/M tokensCheapest price, at Submodel · $0.17 per 1,000 pages
ByteDanceSeed 2.1 Turbo
262k context · tool calling · reads images
$1/M tokensOpenRouter's own price · $0.45 per 1,000 pages
Maker's price in (lower wins)
$0.60/M
$0.50/M
Maker's price out (lower wins)
$2.20/M
$2.50/M
Cheapest price (lower wins)
$0.35/M at Submodel
none below the maker
Maker's price, blended (lower wins)
$1/M
$1/M
Cost per 1,000 pages (lower wins)
$0.17
$0.45
Context
131k tokens
262k tokens
Open weights
yes
not published
Tool calling
yes
yes
Structured output
not published
yes
Reads images
no
yes
Reasoning
yes
yes
Released
28 Jul 2025
12 Aug 2026
Providers selling it
23
10
Price we measure against
the maker's own
OpenRouter
Trains on your prompts (no is better)
not published
no provider to check
Providers selling both · 5
NanoGPT$0.55 / $1
Kilo Gateway$1 / $1
Nous Portal$1 / $1
OpenRouter$1 / $1
Vercel AI Gateway$1 / $1
GLM-4.5, then Seed 2.1 Turbo, per million tokens.
Go further
Add a third or fourth model, or change the weighting, in the tool.
Frequently asked
- Which is cheaper, GLM-4.5 or Seed 2.1 Turbo?
- GLM-4.5, at $0.35 per million tokens against $1 for Seed 2.1 Turbo, blended 3 in : 1 out, read on 31 Oct 2026.
- Where is each one cheapest?
- GLM-4.5: $0.35 at Submodel. Seed 2.1 Turbo: nobody sells it below OpenRouter's own price with a stated reason, so $1 is the number to beat.
- Can I buy both from one provider?
- Yes. 5 providers sell both: NanoGPT, Kilo Gateway, Nous Portal, OpenRouter, Vercel AI Gateway. The cheapest of them for the two together is NanoGPT.
- Which holds more context?
- Seed 2.1 Turbo, at 262k tokens against 131k.
Prices exclude tax, read 31 Oct 2026 from each provider's own catalog. They are per M tokens, blended 3 in : 1 out, and a page is 600 tokens in and 60 out. Bars are scaled to the larger value in each row.
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