Compare · ModelsLive · 2 picked · head to head
Claude Opus 4.6 (Fast) vs GLM 5.1
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 4.6 (Fast) wins on 4/5 benchmarks
Claude Opus 4.6 (Fast) wins 4 of 5 shared benchmarks. Leads in speed · arena.
Category leads
speed·Claude Opus 4.6 (Fast)arena·Claude Opus 4.6 (Fast)
Hype vs Reality
Attention vs performance
Claude Opus 4.6 (Fast)
#150 by perf·no signal
GLM 5.1
#56 by perf·no signal
Best value
GLM 5.1
62.0x better value than Claude Opus 4.6 (Fast)
Claude Opus 4.6 (Fast)
0.5 pts/$
$90.00/M
GLM 5.1
29.9 pts/$
$2.00/M
Vendor risk
Who is behind the model
Anthropic
$380.0B·Tier 1
z-ai
private · undisclosed
Head to head
5 benchmarks · 2 models
Claude Opus 4.6 (Fast)GLM 5.1
Artificial Analysis · Agentic Index
Claude Opus 4.6 (Fast) leads by +37.7
Artificial Analysis Agentic Index · a composite score measuring how well a model performs in agentic workflows · multi-step tool use, planning, error recovery, and autonomous task completion. Aggregates results from multiple agentic benchmarks including SWE-bench, tool-use tests, and planning evaluations. The canonical single-number metric for "how good is this model as an agent?"
Claude Opus 4.6 (Fast)
67.6
GLM 5.1
29.9
Artificial Analysis · Coding Index
GLM 5.1 leads by +7.7
Artificial Analysis Coding Index · a composite score that aggregates performance across multiple coding benchmarks into a single index. Tracks code generation quality, debugging ability, multi-language competence, and real-world software engineering tasks. Used by Artificial Analysis to rank model coding capability in a normalized, comparable format. Useful for developers choosing between models for coding-heavy workloads.
Claude Opus 4.6 (Fast)
48.1
GLM 5.1
55.8
Artificial Analysis · Quality Index
Claude Opus 4.6 (Fast) leads by +12.8
Claude Opus 4.6 (Fast)
53.0
GLM 5.1
40.2
Chatbot Arena Elo · Coding
Claude Opus 4.6 (Fast) leads by +13.0
Claude Opus 4.6 (Fast)
1542.2
GLM 5.1
1529.2
Chatbot Arena Elo · Overall
Claude Opus 4.6 (Fast) leads by +28.4
Claude Opus 4.6 (Fast)
1503.7
GLM 5.1
1475.3
Full benchmark table
| Benchmark | Claude Opus 4.6 (Fast) | GLM 5.1 |
|---|---|---|
Artificial Analysis · Agentic Index Artificial Analysis Agentic Index · a composite score measuring how well a model performs in agentic workflows · multi-step tool use, planning, error recovery, and autonomous task completion. Aggregates results from multiple agentic benchmarks including SWE-bench, tool-use tests, and planning evaluations. The canonical single-number metric for "how good is this model as an agent?" | 67.6 | 29.9 |
Artificial Analysis · Coding Index Artificial Analysis Coding Index · a composite score that aggregates performance across multiple coding benchmarks into a single index. Tracks code generation quality, debugging ability, multi-language competence, and real-world software engineering tasks. Used by Artificial Analysis to rank model coding capability in a normalized, comparable format. Useful for developers choosing between models for coding-heavy workloads. | 48.1 | 55.8 |
Artificial Analysis · Quality Index | 53.0 | 40.2 |
Chatbot Arena Elo · Coding | 1542.2 | 1529.2 |
Chatbot Arena Elo · Overall | 1503.7 | 1475.3 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $30.00 | $150.00 | 1.0M tokens (~500 books) | $600.00 | |
| $0.97 | $3.04 | 203K tokens (~101 books) | $14.83 |