UI-TARS 7B vs Sonar Reasoning Pro
UI-TARS 7B costs 40.0x less per output token than Sonar Reasoning Pro ($0.20 vs $8.00 per million). Updated October 21, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $0.20
- Coding
- No data
- Overall
- No data
- Output $/M
- $8.00
UI-TARS 7B or Sonar Reasoning Pro: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick UI-TARS 7B for output tokens 40.0x cheaper ($0.20 vs $8.00 per million).
No benchmark has tested both yet. UI-TARS 7B has results on Kagi LLM Benchmark; Sonar Reasoning Pro on AA Intelligence Index. Compare them on price and context instead.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Intelligence
AA Intelligence Index
No call
Only Sonar Reasoning Pro has a AA Intelligence Index result, 11.8.
Directional only
Long documents
Listed context window
No call
Both take 128K tokens.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
UI-TARS 7B
UI-TARS 7B $0.0002, Sonar Reasoning Pro $0.0060 per turn.
List prices
At a glance
- Coding index
- UI-TARS 7B not benchmarked, Sonar Reasoning Pro not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- UI-TARS 7B $0.20 against Sonar Reasoning Pro $8.00 per million output tokens, 40.0x apart.
- Context window
- Both take 128K tokens.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | UI-TARS 7B | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 11.8 | Only Sonar Reasoning Pro measured |
| Neither model has a result on the other 1 board here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | UI-TARS 7B | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| Kagi LLM Benchmark | 20.7% | Not measured | Only UI-TARS 7B measured |
| Neither model has a result on the other 21 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
UI-TARS 7B costs less
Repository review
50K input + 3K output tokens
UI-TARS 7B costs less
Agent loop
200K input + 10K output tokens
UI-TARS 7B costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | ByteDance UI-TARS 7B | Perplexity Sonar Reasoning Pro |
|---|---|---|
| Maker | ByteDance | Perplexity |
| Weights | Open weights | No public weights listed |
| Released | July 22, 2025 | March 7, 2025 |
| Context window | 128K | 128K |
| Input $/Mtok | $0.10 | $2.00 |
| Output $/Mtok | $0.20 | $8.00 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is UI-TARS 7B better than Sonar Reasoning Pro for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick UI-TARS 7B for output tokens 40.0x cheaper ($0.20 vs $8.00 per million).
Which is cheaper, UI-TARS 7B or Sonar Reasoning Pro?
UI-TARS 7B costs $0.10 per million input tokens and $0.20 per million output tokens; Sonar Reasoning Pro costs $2.00 and $8.00. Cost per solved task is known for neither of them.
Which has the bigger context window, UI-TARS 7B or Sonar Reasoning Pro?
Neither: both take 128K tokens.
Has any benchmark tested both UI-TARS 7B and Sonar Reasoning Pro?
No benchmark has tested both yet. UI-TARS 7B has results on Kagi LLM Benchmark; Sonar Reasoning Pro on AA Intelligence Index. Compare them on price and context instead. Data as of October 21, 2026.