Devstral 2 2512 vs Grok Code Fast 1
Devstral 2 2512 wins more ground in our testing — 6 benchmarks to Grok Code Fast 1's 3, with 3 ties — and is the stronger pick for tasks requiring structured output, long-context retrieval, multilingual work, and constrained rewriting. Grok Code Fast 1 counters with a top-tier agentic planning score (5/5, tied for 1st of 54) and better safety calibration, at a lower price point ($0.20 input / $1.50 output per MTok vs $0.40 / $2.00). If you're running high-volume agentic coding pipelines where cost compounds, Grok Code Fast 1's pricing advantage and planning edge make it a credible alternative.
mistral
Devstral 2 2512
Benchmark Scores
External Benchmarks
Pricing
Input
$0.400/MTok
Output
$2.00/MTok
modelpicker.net
xai
Grok Code Fast 1
Benchmark Scores
External Benchmarks
Pricing
Input
$0.200/MTok
Output
$1.50/MTok
modelpicker.net
Benchmark Analysis
Across our 12-test internal benchmark suite, Devstral 2 2512 outscores Grok Code Fast 1 on 6 tests, loses on 3, and ties on 3.
Where Devstral 2 2512 wins:
- Constrained rewriting: 5/5 vs 3/5. Devstral 2 2512 ties for 1st of 53 models on this test; Grok Code Fast 1 ranks 31st. This matters for tasks like summarization under character limits, changelog generation, and copy compression — anywhere you need output that hits exact format constraints.
- Structured output: 5/5 vs 4/5. Devstral 2 2512 ties for 1st of 54 models; Grok Code Fast 1 ranks 26th. For API pipelines that consume JSON, schema compliance at this level is a practical differentiator.
- Long context: 5/5 vs 4/5. Devstral 2 2512 ties for 1st of 55 models on 30K+ token retrieval; Grok Code Fast 1 ranks 38th. Both models offer ~256K context windows, but Devstral 2 2512 uses that window more reliably in our tests.
- Multilingual: 5/5 vs 4/5. Devstral 2 2512 ties for 1st of 55; Grok Code Fast 1 ranks 36th. The difference here is meaningful for non-English codebases, documentation, or user-facing content.
- Strategic analysis: 4/5 vs 3/5. Devstral 2 2512 ranks 27th of 54; Grok Code Fast 1 ranks 36th. Better nuanced tradeoff reasoning.
- Creative problem solving: 4/5 vs 3/5. Devstral 2 2512 ranks 9th of 54; Grok Code Fast 1 ranks 30th. A notable gap — Devstral 2 2512 produces more specific and non-obvious solutions in our tests.
Where Grok Code Fast 1 wins:
- Agentic planning: 5/5 vs 4/5. Grok Code Fast 1 ties for 1st of 54 models; Devstral 2 2512 ranks 16th. This is goal decomposition and failure recovery — the core skill for autonomous coding agents. Grok Code Fast 1's reasoning token support (visible traces) likely contributes here.
- Classification: 4/5 vs 3/5. Grok Code Fast 1 ties for 1st of 53; Devstral 2 2512 ranks 31st. For routing, labeling, and categorization tasks, Grok Code Fast 1 is clearly stronger.
- Safety calibration: 2/5 vs 1/5. Grok Code Fast 1 ranks 12th of 55; Devstral 2 2512 ranks 32nd. Neither model excels here — the field median is 2 and the 75th percentile is only 2 — but Grok Code Fast 1 handles refusals more precisely.
Ties (both scored equally):
- Tool calling: both 4/5, both rank 18th of 54. No advantage to either for function-calling workflows.
- Faithfulness: both 4/5, both rank 34th of 55. Equal source adherence.
- Persona consistency: both 4/5, both rank 38th of 53. Equal character stability.
Pricing Analysis
Devstral 2 2512 costs $0.40/MTok input and $2.00/MTok output. Grok Code Fast 1 costs $0.20/MTok input and $1.50/MTok output — 50% cheaper on input and 25% cheaper on output. At 1M output tokens/month, that's $2.00 vs $1.50 — a $0.50 difference you'll barely notice. At 10M output tokens/month, it's $20.00 vs $15.00 — $5.00/month saved. At 100M output tokens/month, the gap grows to $50/month saved with Grok Code Fast 1. The price ratio is 1.33× on output, meaning Devstral 2 2512 costs roughly a third more per output token. For most individual developers or small teams, this difference is minor. For high-throughput agentic systems generating hundreds of millions of tokens monthly — automated code review pipelines, continuous CI agents — the savings add up. Note that Grok Code Fast 1 also uses reasoning tokens (visible in the response), which may increase effective output token counts depending on your use case.
Real-World Cost Comparison
Bottom Line
Choose Devstral 2 2512 if:
- Your pipeline depends on strict JSON schema compliance or structured output (5/5, tied 1st of 54)
- You're working with long documents or codebases and need reliable retrieval at 30K+ tokens (5/5, tied 1st of 55)
- You need multilingual output quality — documentation, comments, or user-facing text in non-English languages (5/5 vs 4/5)
- Constrained rewriting is a core task — summaries, changelogs, copy under hard limits (5/5, tied 1st of 53)
- You want stronger creative problem solving and strategic analysis scores
Choose Grok Code Fast 1 if:
- Agentic planning is your primary workload — autonomous agents that decompose goals and recover from failures (5/5, tied 1st of 54)
- You're building classification or routing systems (4/5, tied 1st of 53 vs Devstral's 3/5 at rank 31)
- You want visible reasoning traces to steer and debug model behavior (reasoning tokens are exposed in the response)
- Cost efficiency matters at scale — $0.20/$1.50 per MTok input/output vs $0.40/$2.00
- Safety calibration is a concern for your deployment context (2/5 vs 1/5)
How We Test
We test every model against our 12-benchmark suite covering tool calling, agentic planning, creative problem solving, safety calibration, and more. Each test is scored 1–5 by an LLM judge. Read our full methodology.