Seed 1.6 Flash vs Devstral 2 2512
Seed 1.6 Flash costs 6.7x less per output token than Devstral 2 2512 ($0.30 vs $2.00 per million). Updated October 22, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $0.30
- Coding
- No data
- Overall
- No data
- Output $/M
- $2.00
Seed 1.6 Flash or Devstral 2 2512: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick Seed 1.6 Flash for output tokens 6.7x cheaper ($0.30 vs $2.00 per million).
No benchmark has tested both yet. Seed 1.6 Flash has none yet; Devstral 2 2512 on SWE-bench Verified, AA Coding Index and LiveCodeBench (Vals AI). 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 Devstral 2 2512 has a AA Intelligence Index result, 8.6.
Directional only
Agentic work
AA Agentic Index
No call
Only Devstral 2 2512 has a AA Agentic Index result, 2.3.
Directional only
Long documents
Listed context window
No call
Both take 262K tokens.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Seed 1.6 Flash
Seed 1.6 Flash $0.0002, Devstral 2 2512 $0.0014 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Devstral 2 2512 has the number, $1.19.
Directional only
At a glance
- Coding index
- Seed 1.6 Flash not benchmarked, Devstral 2 2512 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
- Seed 1.6 Flash $0.30 against Devstral 2 2512 $2.00 per million output tokens, 6.7x apart.
- Context window
- Both take 262K 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.
CodingDirectional onlySix of these boards feed the Vibe Coding Index4 boards measured
| Benchmark | Seed 1.6 Flash | Devstral 2 2512 | Leader |
|---|---|---|---|
| SWE-bench Verified | Not measured | 53.8% | Only Devstral 2 2512 measured |
| AA Coding Index | Not measured | 31.3 | Only Devstral 2 2512 measured |
| LiveCodeBench (Vals AI) | Not measured | 51.8% | Only Devstral 2 2512 measured |
| SWE-bench Verified (Vals AI) | Not measured | 62.8% | Only Devstral 2 2512 measured |
| Neither model has a result on the other 35 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Seed 1.6 Flash | Devstral 2 2512 | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 8.6 | Only Devstral 2 2512 measured |
| Neither model has a result on the other 1 board here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Seed 1.6 Flash | Devstral 2 2512 | Leader |
|---|---|---|---|
| AA Agentic Index | Not measured | 2.3 | Only Devstral 2 2512 measured |
| Neither model has a result on the other 40 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
Seed 1.6 Flash costs less
Repository review
50K input + 3K output tokens
Seed 1.6 Flash costs less
Agent loop
200K input + 10K output tokens
Seed 1.6 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 | ByteDance Seed Seed 1.6 Flash | Mistral Devstral 2 2512 |
|---|---|---|
| Maker | ByteDance Seed | Mistral AI |
| Weights | No public weights listed | Open weights |
| Released | December 23, 2025 | December 9, 2025 |
| Context window | 262K | 262K |
| Input $/Mtok | $0.075 | $0.40 |
| Output $/Mtok | $0.30 | $2.00 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 1 |
| Cost per solved task | Not computable | $1.19 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Seed 1.6 Flash better than Devstral 2 2512 for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Seed 1.6 Flash for output tokens 6.7x cheaper ($0.30 vs $2.00 per million).
Which is cheaper, Seed 1.6 Flash or Devstral 2 2512?
Seed 1.6 Flash costs $0.075 per million input tokens and $0.30 per million output tokens; Devstral 2 2512 costs $0.40 and $2.00. Cost per solved task is known for Devstral 2 2512 only.
Which has the bigger context window, Seed 1.6 Flash or Devstral 2 2512?
Neither: both take 262K tokens.
Has any benchmark tested both Seed 1.6 Flash and Devstral 2 2512?
No benchmark has tested both yet. Seed 1.6 Flash has none yet; Devstral 2 2512 on SWE-bench Verified, AA Coding Index and LiveCodeBench (Vals AI). Compare them on price and context instead. Data as of October 22, 2026.