GLM 5.1vsGPT-6 Astra
GLM 5.1 is cheaper than GPT-6 Astra at $1.4/M vs $10/M input tokens.
| Spec | GLM 5.1 | GPT-6 Astra |
|---|---|---|
| Input price | $1.4/M tokens | $10/M tokens |
| Output price | $4.4/M tokens | $50/M tokens |
| Context window | 203K tokens | 1.1M tokens |
| Weights | Open | Closed |
| Free API (OpenRouter) | No | No |
| Released | Apr 2026 | Sep 2026 |
Our Verdict
GPT-6 Astra
GLM 5.1Runner-up
Not enough votes to call it. On the specs, GPT-6 Astra has the edge: bigger model tier, newer, bigger context window, major provider backing.
GLM 5.1 costs 11x less per token.
Slight edge
API pricing
Cost per 1M tokens
GLM 5.1
Input
$1.40
7.1× cheaper
Output
$4.40
11× cheaper
GPT-6 Astra
Input
$10.00
Output
$50.00
GLM 5.1 is cheaper on both: 7.1× input, 11× output.
Where to run it
17 hosts, cheapest first
GLM 5.115 hosts
Baidu Qianfanfp8$0.96 in$3.03 out203k99.8% upStreamLakefp8$0.97 in$3.04 out200k99.6% upDeepInfrafp4$1.05 in$3.50 out203k100% upSiliconFlowfp8$1.19 in$3.74 out205k99.9% upCrusoefp8$1.20 in$4.40 out203k99.8% upAtlasCloudfp8$1.26 in$3.96 out203k99.6% up
9 more hostsFewer hosts
Alibaba Cloudfp8$1.33 in$4.18 out203k100% upNovitafp8$1.38 in$4.40 out205k99.7% upFriendli$1.40 in$4.40 out203k99.9% upGMI Cloudfp8$1.40 in$4.40 out203k99.2% upNebiusfp8$1.40 in$4.40 out203k90.8% upZ.aifp8$1.40 in$4.40 out203k99.7% upVenicefp8$1.54 in$4.84 out200k93.6% upChutesfp8degraded$0.98 in$3.08 out203k78% upPhaladegraded$1.21 in$4.20 out203k76.7% up
Per million tokens. Prices and uptime via OpenRouter, checked 9 Sep 2026.
Writing DNA
Style Comparison
Similarity
39%
GPT-6 Astra uses 3.6x more emoji
GLM 5.1
GPT-6 Astra
54%Vocabulary62%
18wSentence Length15w
0.31Hedging0.87
3.6Bold4.0
2.6Lists2.3
0.00Emoji0.04
0.43Headings0.77
0.11Transitions0.10
Based on 27 + 27 text responses
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