Grok 4.20 Multi-Agent vs Qwen3.8 Omni Flash
Qwen3.8 Omni Flash costs 5.3x less per output token than Grok 4.20 Multi-Agent ($0.47 vs $2.50 per million). Updated October 22, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $2.50
- Coding
- No data
- Overall
- No data
- Output $/M
- $0.47
Grok 4.20 Multi-Agent or Qwen3.8 Omni Flash: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick Grok 4.20 Multi-Agent for a larger context window (2M against 1M tokens).
No benchmark has tested either model yet, so price and context are the only way to compare them.
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
Long documents
Listed context window
Grok 4.20 Multi-Agent
Grok 4.20 Multi-Agent takes 2M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Qwen3.8 Omni Flash
Grok 4.20 Multi-Agent $0.0025, Qwen3.8 Omni Flash $0.0004 per turn.
List prices
At a glance
- Coding index
- Grok 4.20 Multi-Agent not benchmarked, Qwen3.8 Omni Flash 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
- Grok 4.20 Multi-Agent $2.50 against Qwen3.8 Omni Flash $0.47 per million output tokens, 5.3x apart.
- Context window
- Grok 4.20 Multi-Agent takes 2M tokens, Qwen3.8 Omni Flash 1M.
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.
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
Qwen3.8 Omni Flash costs less
Repository review
50K input + 3K output tokens
Qwen3.8 Omni Flash costs less
Agent loop
200K input + 10K output tokens
Qwen3.8 Omni Flash 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 | SpaceXAI Grok 4.20 Multi-Agent | Qwen3.8 Omni Flash |
|---|---|---|
| Maker | xAI | Qwen |
| Weights | No public weights listed | No public weights listed |
| Released | March 31, 2026 | September 21, 2026 |
| Context window | 2M | 1M |
| Input $/Mtok | $1.25 | $0.15 |
| Output $/Mtok | $2.50 | $0.47 |
| 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 Grok 4.20 Multi-Agent better than Qwen3.8 Omni Flash for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Grok 4.20 Multi-Agent for a larger context window (2M against 1M tokens).
Which is cheaper, Grok 4.20 Multi-Agent or Qwen3.8 Omni Flash?
Grok 4.20 Multi-Agent costs $1.25 per million input tokens and $2.50 per million output tokens; Qwen3.8 Omni Flash costs $0.15 and $0.47. Cost per solved task is known for neither of them.
Which has the bigger context window, Grok 4.20 Multi-Agent or Qwen3.8 Omni Flash?
Grok 4.20 Multi-Agent, with 2M tokens against 1M.
Has any benchmark tested both Grok 4.20 Multi-Agent and Qwen3.8 Omni Flash?
No benchmark has tested either model yet, so price and context are the only way to compare them. Data as of October 22, 2026.