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 4/4 benchmarks
Claude Opus 4.6 (Fast) wins 4 of 4 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)
#122 by perf·no signal
GLM 5.1
#16 by perf·no signal
Best value
GLM 5.1
64.0x better value than Claude Opus 4.6 (Fast)
Claude Opus 4.6 (Fast)
0.5 pts/$
$90.00/M
GLM 5.1
30.9 pts/$
$2.27/M
Vendor risk
Who is behind the model
Anthropic
$380.0B·Tier 1
z-ai
private · undisclosed
Head to head
4 benchmarks · 2 models
Claude Opus 4.6 (Fast)GLM 5.1
Artificial Analysis · Agentic Index
Claude Opus 4.6 (Fast) leads by +0.5
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
67.0
Artificial Analysis · Coding Index
Claude Opus 4.6 (Fast) leads by +4.7
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
43.4
Artificial Analysis · Quality Index
Claude Opus 4.6 (Fast) leads by +1.5
Claude Opus 4.6 (Fast)
53.0
GLM 5.1
51.4
Chatbot Arena Elo · Overall
Claude Opus 4.6 (Fast) leads by +35.3
Claude Opus 4.6 (Fast)
1502.8
GLM 5.1
1467.4
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 | 67.0 |
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 | 43.4 |
Artificial Analysis · Quality Index | 53.0 | 51.4 |
Chatbot Arena Elo · Overall | 1502.8 | 1467.4 |
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 | |
| $1.05 | $3.50 | 203K tokens (~101 books) | $16.63 |