Head-to-Head Model Comparison

Devstral Small vs GPT-5.1 Codex mini

Benchmarks, API Token Pricing, Context Window & Speed Comparison

Verificato dal team di ricerca di GetInfoUsUltima verifica: October 2026Politica editoriale
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AI CompareAI BenchmarkToken PricingModel CostModel SpecsSWE-bench CodingModel VersusWhich AI ModelLLM Speed & LatencyReasoning ModelsExtended ThinkingPrompt Caching ROI
Devstral Small vs GPT-5.1 Codex mini: Benchmarks, Pricing & Speed Comparison

Devstral Small di Mistral AI e GPT-5.1 Codex mini di OpenAI sono due modelli di IA di riferimento. Devstral Small offre una finestra di contesto di 128K token a $0.15/$0.45 per milione di token, mentre GPT-5.1 Codex mini mette a disposizione 400K token di contesto a $0.25/$2.00 per milione di token. Di seguito analizziamo benchmark, latenza e costi.

Confronto Diretto (VS)

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Mistral AI

Devstral Small

IA Agentica e Strumenti Autonomi

Devstral Small di Mistral AI è un modello di IA progettato per i workflow agentici autonomi, il tool calling e l’automazione multi-step, con finestra di contesto da 128K, velocità di 95 token/s, indice di intelligenza di 45/100 e tariffa di

Intelligence Index45 / 100
Input Token:

$0.15 / 1M

Output Token:

$0.45 / 1M

Context Window:

128K tokens

SWE-bench Verified:

42%

OpenAI

GPT-5.1 Codex mini

Modello Leggero ed Economico

GPT-5.1 Codex mini di OpenAI è un modello di IA progettato per la massima efficienza dei costi per token e l’inferenza rapida in produzione, con finestra di contesto da 400K, velocità di 180 token/s, indice di intelligenza di 47/100 e tarif

Intelligence Index47 / 100
Input Token:

$0.25 / 1M

Output Token:

$2.00 / 1M

Context Window:

400K tokens

SWE-bench Verified:

55.5%

Differenze Chiave a Colpo d’Occhio

  • Devstral Small is 3.1x cheaper for API usage (input + output tokens combined).
  • GPT-5.1 Codex mini has a larger context window (400K vs 128K tokens).
  • GPT-5.1 Codex mini is faster at 180 tok/s vs 95 tok/s.
  • GPT-5.1 Codex mini leads on SWE-bench coding (55.5% vs 42.0%).
Need definitions for token pricing, context, or benchmarks?Explore AI Glossary →
FeatureDevstral SmallGPT-5.1 Codex mini
Intelligence Index
Composite reasoning & knowledge score (0-100)
4547
Provider
Mistral AIOpenAI
Input Price
Cost per million input tokens
$0.15 / 1M$0.25 / 1M
Output Price
Cost per million output tokens
$0.45 / 1M$2.00 / 1M
Blended Price
Weighted 7:2:1 cache:input:output per 1M
$0.11 / 1M$0.27 / 1M
Context Window
Maximum input + output tokens
128K tokens~192 A4 pages of text400K tokens~600 A4 pages of text
Max Output Tokens
Per single request
16K128K
Throughput Speed
Tokens generated per second
95 tok/s180 tok/s
SWE-bench Verified
Real-world software engineering
42%55.5%
GPQA Diamond
Graduate-level reasoning
50%66.5%
Cached Input Price
Prompt caching discount per 1M tokens
$0.05 / 1M$0.03 / 1M

Chi vince in ogni categoria?

At-a-glance decision framework
Coding
GPT-5.1 Codex mini
+13.5% SWE-bench lead
Cost
Devstral Small
3.1x cheaper monthly runtime
Speed
GPT-5.1 Codex mini
+89% faster generation
Context
GPT-5.1 Codex mini
400K tokens window

Punteggi Benchmark Verificati

Official evaluation metrics verified by independent third-party research labs.

Devstral SmallGPT-5.1 Codex mini
SWE-bench Verified (Autonomous Coding)

Industry benchmark evaluating real-world GitHub issue resolution and multi-file debugging.

42%vs55.5%
GPQA Diamond (Doctorate-Level Science & Math)

Challenging questions created by domain experts to test complex PhD-level reasoning.

50%vs66.5%
MMLU-Pro (Multi-task Language Understanding)

Hardened reasoning and academic knowledge benchmark with reduced lucky-guess probability.

74%vs79%
LMSYS Chatbot Arena Elo

Crowdsourced human preference evaluation based on blind, head-to-head model battles.

1270ptsvs1320pts
Humanity's Last Exam (Frontier Expert Knowledge)

Extremely difficult, closed-ended questions spanning the frontier of human expert knowledge.

N/Avs9.4%
Terminal-Bench (Agentic Coding & Terminal Use)

Autonomous multi-step tasks executed inside a real command-line terminal environment.

36.5%vs32%
SciCode (Scientific Computing)

Research-grade coding problems drawn from real scientific and numerical workloads.

N/Avs33%
LiveCodeBench (Competitive Coding)

Contamination-free competitive programming problems collected continuously over time.

N/Avs58%
AIME (Advanced Math Competition)

American Invitational Mathematics Examination — multi-step Olympiad-level reasoning.

60%vs84.5%
Long-Context Reasoning

Accuracy when reasoning over very large inputs that fill the model context window.

70%vs69%
Generation Speed (Throughput)

Tokens emitted per second during active generation streaming.

95 tok/s vs180 tok/s

Latenza e Tempo di Risposta

Time to first token (TTFT) and estimated end-to-end response time for a typical 500-token response.

Time to First Token (TTFT)Lower is better
Devstral Small0.42s
GPT-5.1 Codex mini0.72s
Est. End-to-End Response (500 tokens)TTFT + generation time
Devstral Small5.68s
GPT-5.1 Codex mini3.50s

Simulatore Interattivo dei Costi Token

Adjust sliders to calculate projected monthly cloud API spending with prompt caching discounts.

100K / day
10K500K1M
30K / day
5K150K300K
50% cached
0% (Cold)50%90% (Warm)
Devstral Small Monthly API Bill
$0.71 / month
$0.15/1M in · $0.45/1M out
GPT-5.1 Codex mini Monthly API Bill
$2.21 / month
$0.25/1M in · $2/1M out
Devstral Small saves approximately $1.51 / month (68%) under this workload.3.1x Savings

Devstral Small · Strengths & Key Advantages

  • Finestra di contesto da 128K con capacità massima di output fino a 16K token (SWE-bench Verified 42% · GPQA Diamond 50%)
  • Throughput elevato di 95 token/secondo con latenza al primo token (TTFT) di soli 420 ms
  • Pesi aperti (24B) pronti per il self-hosting locale o su cloud privato tramite vLLM, SGLang o Ollama
Considerations & Trade-offs
  • Richiede server GPU dedicati con sufficiente memoria VRAM per l’esecuzione locale a piena precisione
  • Nelle dimostrazioni scientifiche più estreme, i modelli di ragionamento pesante dedicati offrono maggiore profondità

GPT-5.1 Codex mini · Strengths & Key Advantages

  • Finestra di contesto da 400K con capacità massima di output fino a 128K token (SWE-bench Verified 55.5% · GPQA Diamond 66.5%)
  • Throughput elevato di 180 token/secondo con latenza al primo token (TTFT) di soli 720 ms
  • Economia API competitiva ($0.25/$2 per 1M di token) con supporto per prompt caching, tool calling e output JSON strutturati
Considerations & Trade-offs
  • Modello cloud proprietario chiuso; non consente il download locale dei pesi per l’esecuzione offline
  • Nelle dimostrazioni scientifiche più estreme, i modelli di ragionamento pesante dedicati offrono maggiore profondità

Token Use & Task Economics

Estimated cost and token consumption to complete one representative agentic task.

MetricDevstral SmallGPT-5.1 Codex mini
Cost per Task
Estimated USD to finish one task
$0.14$0.33
Output Tokens / Task
Tokens generated per task
30K48K
Reasoning Tokens / Task
Thinking tokens burned per task
0K23K

Specifiche Tecniche

Architecture, release timeline, capabilities, and modalities.

FeatureDevstral SmallGPT-5.1 Codex mini
Official API Model ID (SDK)devstral-small-latestgpt-5-1-codex-mini
API ProtocolOpenAI-Compatible REST / vLLM / SGLang / HuggingFace TGIOpenAI Responses API & Chat Completions v1
Release Date2025-072025-11
Knowledge CutoffMay 2025October 2024
ArchitectureCode-Optimized Autoregressive TransformerCompact code-specialised reasoning model
Parameters24BConfidential
Enterprise Rate Limits (RPM / TPM)Unlimited (Hardware-bound on self-hosted GPU) / 10,000 RPM Cloud · Unlimited local throughput / 10M+ TPM Managed Cloud10,000 – 30,000 RPM (Tier 5 Enterprise) · 800,000 – 2,000,000 TPM
Long-Context Tier (>128K/200K)Flat rate ($0.15/1M in) across full 128K windowFlat rate ($0.25/1M in) across full 400K window
Prompt Cache Policy & TTLCached input at $0.05/1M tokensAutomatic prefix caching at $0.025/1M (no extra cache-write fee)
Computer Use / GUI AgentAPI / CLI Tool-Use & DOM Agent ready (no raw pixel desktop click loop)Supported (Screen coordinate grounding, browser & desktop GUI action loops)
MCP & Parallel Tool CallingNative MCP Client/Server ready · Parallel function calling · 100% Strict JSON SchemaNative MCP Client/Server ready · Parallel function calling · 100% Strict JSON Schema
Web Search Grounding & SandboxSupported via external Tavily/Exa Search & E2B/Docker Sandbox toolsNative Web Search tool + Hosted Code Interpreter & File Search RAG
Official Fine-Tuning SupportFull Weights SFT, LoRA, QLoRA, DPO & GRPO RL (Unsloth / Axolotl / Llama-Factory)Supervised Fine-Tuning (SFT), Direct Preference (DPO) & Reinforcement Fine-Tuning (RFT)
Multimodal Token BillingText BPE (~4 chars/token)Text BPE (~4 chars/token) · Vision (~258–765 tokens per image tile)
Quantization & Min GPU VRAMBF16 / FP16, FP8 Dynamic, INT4 AWQ / GPTQ, GGUF (Q4_K_M / Q8_0) · 15 GB VRAM (4-bit Quantized) · 52 GB VRAM (Native BF16)Cloud-Hosted Proprietary (FP8 / BF16 Tensor Core Cluster) · Zero Local VRAM Required (100% Serverless Cloud API)
Safety & Frontier ClassificationOpen-Weights System Card + Customizable Guardrail Layer (Llama Guard / ShieldGemma)OpenAI Preparedness Framework Audited & System Card Published
Enterprise Compliance (ZDR/HIPAA/SOC2)100% Air-Gapped On-Premises / Private VPC · Full HIPAA, GDPR & SOC2 ControlSOC2 Type II · GDPR · Zero Data Retention (ZDR) & HIPAA BAA Available on Enterprise Tier
Input Modalitiestexttext, vision
Output Modalitiestexttext

Devstral Small vs GPT-5.1 Codex mini: Risposte Rapide (FAQ)

Which is more intelligent, Devstral Small or GPT-5.1 Codex mini?

GPT-5.1 Codex mini is more intelligent. It scores 47 compared with 45 on the composite Intelligence Index.

Which model is faster?

GPT-5.1 Codex mini is faster, generating 180 tokens per second compared with 95 tokens per second.

Which model is cheaper to run?

Devstral Small is cheaper at $0.11 per 1M tokens blended, compared with $0.27 (7:2:1 cache:input:output ratio).

Which model has lower latency?

Devstral Small has lower latency, with a time to first token of 0.42s compared with 0.72s.

Which model has a larger context window?

GPT-5.1 Codex mini has a larger context window, supporting 400K tokens compared with 128K tokens.

Verdetto

Sia Devstral Small (Ideale per i workflow agentici autonomi, il tool calling e l’automazione multi-step, sistemi RAG aziendali e integrazioni API scalabili.) sia GPT-5.1 Codex mini (Ideale per la massima efficienza dei costi per token e l’inferenza rapida in produzione, sistemi RAG aziendali e integrazioni API scalabili.) eccellono in produzione: GPT-5.1 Codex mini guida nei benchmark di ragionamento e programmazione, GPT-5.1 Codex mini garantisce una generazione più rapida e Devstral Small offre il miglior rapporto qualità-prezzo per carichi API elevati.

Domande Frequenti (FAQ)

Quale modello è migliore per coding e ragionamento, Devstral Small o GPT-5.1 Codex mini?+

Nell’indice di intelligenza composito e nei benchmark di programmazione prevale GPT-5.1 Codex mini. Consulta i punteggi SWE-bench e GPQA qui sopra per tutti i dettagli.

Qual è la differenza di prezzo API tra Devstral Small e GPT-5.1 Codex mini?+

Devstral Small costa $0.15 / $0.45 per milione di token di input/output, mentre GPT-5.1 Codex mini costa $0.25 / $2.00. Nel costo combinato, Devstral Small risulta più economico.

Quale modello ha la finestra di contesto più ampia e la velocità maggiore?+

Devstral Small supporta 128K token di contesto contro 400K token di GPT-5.1 Codex mini, mentre GPT-5.1 Codex mini offre una velocità di generazione superiore.

AI Terminology & Guide
Explore Glossary →

Understand key metrics like context window, token pricing, reasoning mode, and SWE-bench scores in our comprehensive AI glossary.

Benchmark scores, token prices, and rate limits evolve rapidly as AI labs release model updates. Always verify current specifications and pricing on the official provider documentation.

Fonti ufficiali: Documentazione API ufficiale di Mistral AI e OpenAI, schede di sistema e benchmark indipendenti (2026).