GLM-5.1 vs GPT-5.6 Terra Pro

Prices checked

GLM-5.1 takes 3 of 5 rounds against GPT-5.6 Terra Pro. It is also the cheaper of the two to run, at $1.08 per million tokens against $2.25.

Z.aiWins 3 rounds

GLM-5.1

200k context · tool calling · open weights

$1.08/M tokens

Cheapest price, at HPC-AI · $0.52 per 1,000 pages

OpenAI

GPT-5.6 Terra Pro

1.1M context · tool calling · reads images

$2.25/M tokens

OpenAI's own price · $0.96 per 1,000 pages

Maker's price in (lower wins)

$1.40/M

$1/M

Maker's price out (lower wins)

$4.40/M

$6/M

Cheapest price (lower wins)

$1.08/M at HPC-AI

none below the maker

Maker's price, blended (lower wins)

$2.15/M

$2.25/M

Cost per 1,000 pages (lower wins)

$0.52

$0.96

Context

200k tokens

1.1M tokens

Open weights

yes

not published

Tool calling

yes

yes

Structured output

yes

yes

Reads images

no

yes

Reasoning

yes

yes

Released

7 Apr 2026

9 Jul 2026

Providers selling it

58

10

Price we measure against

the maker's own

the maker's own

Trains on your prompts (no is better)

not published

no provider to check

Providers selling both · 6

  • NanoGPT$1.15 / $4.50
  • Nous Portal$1.40 / $4.50
  • LLMTR$1.94 / $4.50
  • 302.AI$2.15 / $4.50
  • Kilo Gateway$2.15 / $4.50
  • OpenRouter$2.15 / $4.50

GLM-5.1, then GPT-5.6 Terra Pro, per million tokens.

Go further

Add a third or fourth model, or change the weighting, in the tool.

What moved this week

  1. GLM-5.1

    io.net Intelligence · 2% dearer ·

    $1.40 / $4.40 $1.37 / $4.31
  2. GLM-5.1

    Baidu · 45% dearer ·

    $1.40 / $4.40 $0.96 / $3.03
  3. GLM-5.1

    Chutes · 7% cheaper ·

    $0.90 / $2.90 $0.98 / $3.08
  4. GLM-5.1

    Chutes · 7% cheaper ·

    $0.90 / $2.90 $0.98 / $3.08
  5. GLM-5.1

    Nous Portal · 6% cheaper ·

    $0.90 / $2.90 $0.97 / $3.04

Frequently asked

Which is cheaper, GLM-5.1 or GPT-5.6 Terra Pro?
GLM-5.1, at $1.08 per million tokens against $2.25 for GPT-5.6 Terra Pro, blended 3 in : 1 out, read on 31 Oct 2026.
Where is each one cheapest?
GLM-5.1: $1.08 at HPC-AI. GPT-5.6 Terra Pro: nobody sells it below the maker's own price with a stated reason, so $2.25 is the number to beat.
Can I buy both from one provider?
Yes. 6 providers sell both: NanoGPT, Nous Portal, LLMTR, 302.AI, Kilo Gateway, OpenRouter. The cheapest of them for the two together is NanoGPT.
Which holds more context?
GPT-5.6 Terra Pro, at 1.1M tokens against 200k.

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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