Solar Pro 4 vs. Agnes 2.5 Pro Alpha
Comparison between Solar Pro 4 and Agnes 2.5 Pro Alpha across intelligence, price, speed, context window and more.
For details relating to our methodology, see our Methodology page.
Highlights
Model Comparison
Solar Pro 4 | Agnes 2.5 Pro Alpha | ||
|---|---|---|---|
| Intelligence Index | 42 | 40 | Solar Pro 4 is more intelligent than Agnes 2.5 Pro Alpha |
| Price per 1M Tokens | $0.22 | $0.18 | Agnes 2.5 Pro Alpha is cheaper than Solar Pro 4 |
| Output Speed | 62 tokens/s | 131 tokens/s | Agnes 2.5 Pro Alpha is faster than Solar Pro 4 |
| Time to First Token | 2.14s | 2.37s | Solar Pro 4 responds faster than Agnes 2.5 Pro Alpha |
| Context Window | 512k tokens~768 A4 pages of size 12 Arial font | 1000k tokens~1,500 A4 pages of size 12 Arial font | Agnes 2.5 Pro Alpha has a larger context window than Solar Pro 4 |
| Release Date | August 2026 | July 2026 | Solar Pro 4 has a more recent release date than Agnes 2.5 Pro Alpha |
| Reasoning | Yes | Yes | Both Solar Pro 4 and Agnes 2.5 Pro Alpha have reasoning |
| Image Input Support | No | Yes | Agnes 2.5 Pro Alpha has image input support while Solar Pro 4 does not |
| Open Source (Weights) | No | No | Both Solar Pro 4 and Agnes 2.5 Pro Alpha are proprietary |
Intelligence
Artificial Analysis Intelligence Index
Artificial Analysis Intelligence Index by Open Weights / Proprietary
Intelligence Evaluations
Agentic real-world work tasks, (Elo-500)/2000
Agentic tool use
Agentic coding & terminal use
Coding
Reasoning & knowledge
Scientific reasoning
Physics reasoning
Knowledge
1 - hallucination rate
Long context reasoning
Agentic knowledge work, Elo
Agentic SaaS workflows
Legal agentic work, criterion pass rate
Agentic business operations
Quantitative analysis on spreadsheets & documents
Instruction following
Long-horizon agentic tasks
Kubernetes incident root-cause analysis
Visual reasoning
AA-Briefcase
AA-Briefcase Elo
AA-Omniscience
AA-Omniscience Index
Openness Index
Artificial Analysis Openness Index: Score
Intelligence Index Comparisons
Intelligence Index vs. Cost per Intelligence Index Task
Token Use
Output Tokens per Intelligence Index Task
Cost
Cost per Intelligence Index Task
Cost to Run Artificial Analysis Intelligence Index
Pricing: Cache Hit, Input, and Output
Context Window
Context Window
Speed
Measured by Output Speed (tokens per second)
Output Speed
Time per Intelligence Index Task
Latency
Measured by Time (seconds) to First Token
Latency: Time To First Answer Token
End-to-End Response Time
Seconds to output 500 tokens, calculated based on time to first token, 'thinking' time for reasoning models, and output speed
End-to-End Response Time
Model Size (Open Weights Models Only)
Model Size: Total and Active Parameters
Frequently Asked Questions
Solar Pro 4 is more intelligent. Solar Pro 4 scores 42, compared with Agnes 2.5 Pro Alpha at 40 on the Artificial Analysis Intelligence Index.
Agnes 2.5 Pro Alpha is faster. Agnes 2.5 Pro Alpha generates 131.4 tokens per second, compared with Solar Pro 4 at 62.3 tokens per second.
Agnes 2.5 Pro Alpha is cheaper. Agnes 2.5 Pro Alpha costs $0.18 per 1M tokens, compared with Solar Pro 4 at $0.22 per 1M tokens (7:2:1 cache hit/input/output ratio).
Solar Pro 4 has lower latency. Solar Pro 4 has a time to first token of 2.14s, compared with Agnes 2.5 Pro Alpha at 2.37s.
Agnes 2.5 Pro Alpha has a larger context window. Agnes 2.5 Pro Alpha supports 1.0M tokens, compared with Solar Pro 4 at 510k tokens.