Head-to-Head Model Comparison

GPT-5.1 Codex Max vs Devstral 2

Benchmarks, API Token Pricing, Context Window & Speed Comparison

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AI CompareAI BenchmarkToken PricingModel CostModel SpecsSWE-bench CodingModel VersusWhich AI ModelLLM Speed & LatencyReasoning ModelsExtended ThinkingPrompt Caching ROI
GPT-5.1 Codex Max vs Devstral 2: Benchmarks, Pricing & Speed Comparison

GPT-5.1 Codex Max von OpenAI und Devstral 2 von Mistral AI gehören zu den führenden KI-Modellen. GPT-5.1 Codex Max bietet ein Kontextfenster von 400K Tokens bei API-Preisen von $1.75/$14.00 pro 1M Tokens, während Devstral 2 262.1K Tokens Kontext zu $1.50/$4.50 pro 1M Tokens bereitstellt. Hier finden Sie den vollständigen Benchmark-, Latenz- und Kostenvergleich.

Direktvergleich (VS)

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OpenAI

GPT-5.1 Codex Max

Frontier-Flaggschiff-Modell

GPT-5.1 Codex Max von OpenAI ist ein KI-Modell für anspruchsvolles Enterprise-Reasoning, Softwareentwicklung und produktive KI-Workflows mit 400K Kontextfenster, 95 Token/s Durchsatz, einem Intelligenz-Index von 62/100 und $1.75/$14 pro 1M

Intelligence Index62 / 100
Input Token:

$1.75 / 1M

Output Token:

$14.00 / 1M

Context Window:

400K tokens

SWE-bench Verified:

78.2%

Mistral AI

Devstral 2

Autonomes Agenten-Modell

Devstral 2 von Mistral AI ist ein KI-Modell für autonome Agenten-Workflows, zuverlässiges Tool-Calling und mehrstufige Automatisierung mit 262K Kontextfenster, 70 Token/s Durchsatz, einem Intelligenz-Index von 56/100 und $1.5/$4.5 pro 1M To

Intelligence Index56 / 100
Input Token:

$1.50 / 1M

Output Token:

$4.50 / 1M

Context Window:

262.1K tokens

SWE-bench Verified:

58.2%

Wichtigste Unterschiede auf einen Blick

  • Devstral 2 is 2.3x cheaper for API usage (input + output tokens combined).
  • GPT-5.1 Codex Max has a larger context window (400K vs 262K tokens).
  • GPT-5.1 Codex Max is faster at 95 tok/s vs 70 tok/s.
  • GPT-5.1 Codex Max leads on SWE-bench coding (78.2% vs 58.2%).
Need definitions for token pricing, context, or benchmarks?Explore AI Glossary →
FeatureGPT-5.1 Codex MaxDevstral 2
Intelligence Index
Composite reasoning & knowledge score (0-100)
6256
Provider
OpenAIMistral AI
Input Price
Cost per million input tokens
$1.75 / 1M$1.50 / 1M
Output Price
Cost per million output tokens
$14.00 / 1M$4.50 / 1M
Blended Price
Weighted 7:2:1 cache:input:output per 1M
$1.87 / 1M$0.99 / 1M
Context Window
Maximum input + output tokens
400K tokens~600 A4 pages of text262.1K tokens~393 A4 pages of text
Max Output Tokens
Per single request
128K66K
Throughput Speed
Tokens generated per second
95 tok/s70 tok/s
SWE-bench Verified
Real-world software engineering
78.2%58.2%
GPQA Diamond
Graduate-level reasoning
80%66.5%
Cached Input Price
Prompt caching discount per 1M tokens
$0.17 / 1M$0.35 / 1M

Wer gewinnt in welcher Disziplin?

At-a-glance decision framework
Coding
GPT-5.1 Codex Max
+20.0% SWE-bench lead
Cost
Devstral 2
2.3x cheaper monthly runtime
Speed
GPT-5.1 Codex Max
+36% faster generation
Context
GPT-5.1 Codex Max
400K tokens window

Geprüfte Benchmark-Ergebnisse im Vergleich

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

GPT-5.1 Codex MaxDevstral 2
SWE-bench Verified (Autonomous Coding)

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

78.2%vs58.2%
GPQA Diamond (Doctorate-Level Science & Math)

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

80%vs66.5%
MMLU-Pro (Multi-task Language Understanding)

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

87.2%vs83.5%
LMSYS Chatbot Arena Elo

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

1378ptsvs1365pts
Humanity's Last Exam (Frontier Expert Knowledge)

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

13.2%vsN/A
Terminal-Bench (Agentic Coding & Terminal Use)

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

54.5%vs52%
SciCode (Scientific Computing)

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

48.5%vsN/A
LiveCodeBench (Competitive Coding)

Contamination-free competitive programming problems collected continuously over time.

75.5%vsN/A
AIME (Advanced Math Competition)

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

92.6%vs78%
Long-Context Reasoning

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

80%vs82%
Generation Speed (Throughput)

Tokens emitted per second during active generation streaming.

95 tok/s vs70 tok/s

Latenz & Antwortzeit

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
GPT-5.1 Codex Max1.70s
Devstral 20.52s
Est. End-to-End Response (500 tokens)TTFT + generation time
GPT-5.1 Codex Max6.96s
Devstral 27.66s

Interaktiver Token-Kosten-Simulator

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)
GPT-5.1 Codex Max Monthly API Bill
$15.49 / month
$1.75/1M in · $14/1M out
Devstral 2 Monthly API Bill
$6.82 / month
$1.5/1M in · $4.5/1M out
Devstral 2 saves approximately $8.66 / month (56%) under this workload.2.3x Savings

GPT-5.1 Codex Max · Strengths & Key Advantages

  • 400K Kontextfenster und bis zu 128K maximale Output-Token (SWE-bench Verified 78.2% · GPQA Diamond 80%)
  • Hohe Generierungsgeschwindigkeit von 95 Token/Sekunde bei nur 1700 ms Erstlatenz (TTFT)
  • Effiziente API-Struktur ($1.75/$14 pro 1M Token) inklusive Prompt-Caching, Tool-Calling und strikter JSON-Ausgabe
Considerations & Trade-offs
  • Proprietäres Cloud-Modell ohne Möglichkeit zum lokalen Download der Modellgewichte
  • Bei extrem komplexen mehrstufigen Forschungsfragen bieten schwere Reasoning-Spezialmodelle noch tiefere Analysen

Devstral 2 · Strengths & Key Advantages

  • 262K Kontextfenster und bis zu 66K maximale Output-Token (SWE-bench Verified 58.2% · GPQA Diamond 66.5%)
  • Hohe Generierungsgeschwindigkeit von 70 Token/Sekunde bei nur 520 ms Erstlatenz (TTFT)
  • Offene Modellgewichte (123B) für lokales Self-Hosting und Fine-Tuning über vLLM, SGLang oder Ollama
Considerations & Trade-offs
  • Erfordert dedizierte GPU-Hardware mit ausreichend VRAM für den lokalen Betrieb in voller Präzision
  • Bei extrem komplexen mehrstufigen Forschungsfragen bieten schwere Reasoning-Spezialmodelle noch tiefere Analysen

Token Use & Task Economics

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

MetricGPT-5.1 Codex MaxDevstral 2
Cost per Task
Estimated USD to finish one task
$2.40$0.65
Output Tokens / Task
Tokens generated per task
62K42K
Reasoning Tokens / Task
Thinking tokens burned per task
36K20K

Technische Spezifikationen

Architecture, release timeline, capabilities, and modalities.

FeatureGPT-5.1 Codex MaxDevstral 2
Official API Model ID (SDK)gpt-5-1-codex-maxdevstral-2-latest
API ProtocolOpenAI Responses API & Chat Completions v1OpenAI-Compatible REST / vLLM / SGLang / HuggingFace TGI
Release Date2025-112025-12
Knowledge CutoffOctober 2024October 2025
ArchitectureMaximum-capability code-specialised reasoning modelAdvanced Agentic Code Transformer
ParametersConfidential123B
Enterprise Rate Limits (RPM / TPM)10,000 – 30,000 RPM (Tier 5 Enterprise) · 800,000 – 2,000,000 TPMUnlimited (Hardware-bound on self-hosted GPU) / 10,000 RPM Cloud · Unlimited local throughput / 10M+ TPM Managed Cloud
Long-Context Tier (>128K/200K)Flat rate ($1.75/1M in) across full 400K windowFlat rate ($1.5/1M in) across full 262K window
Prompt Cache Policy & TTLAutomatic prefix caching at $0.175/1M (no extra cache-write fee)Cached input at $0.35/1M tokens
Computer Use / GUI AgentSupported (Screen coordinate grounding, browser & desktop GUI action loops)API / CLI Tool-Use & DOM Agent ready (no raw pixel desktop click loop)
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 & SandboxNative Web Search tool + Hosted Code Interpreter & File Search RAGSupported via external Tavily/Exa Search & E2B/Docker Sandbox tools
Official Fine-Tuning SupportSupervised Fine-Tuning (SFT), Direct Preference (DPO) & Reinforcement Fine-Tuning (RFT)Full Weights SFT, LoRA, QLoRA, DPO & GRPO RL (Unsloth / Axolotl / Llama-Factory)
Multimodal Token BillingText BPE (~4 chars/token) · Vision (~258–765 tokens per image tile)Text BPE (~4 chars/token)
Quantization & Min GPU VRAMCloud-Hosted Proprietary (FP8 / BF16 Tensor Core Cluster) · Zero Local VRAM Required (100% Serverless Cloud API)BF16 / FP16, FP8 Dynamic, INT4 AWQ / GPTQ, GGUF (Q4_K_M / Q8_0) · 76 GB VRAM (4-bit Quantized) · 264 GB VRAM (Native BF16)
Safety & Frontier ClassificationOpenAI Preparedness Framework Audited & System Card PublishedOpen-Weights System Card + Customizable Guardrail Layer (Llama Guard / ShieldGemma)
Enterprise Compliance (ZDR/HIPAA/SOC2)SOC2 Type II · GDPR · Zero Data Retention (ZDR) & HIPAA BAA Available on Enterprise Tier100% Air-Gapped On-Premises / Private VPC · Full HIPAA, GDPR & SOC2 Control
Input Modalitiestext, visiontext
Output Modalitiestexttext

GPT-5.1 Codex Max vs Devstral 2: Schnelle Antworten (FAQ)

Which is more intelligent, GPT-5.1 Codex Max or Devstral 2?

GPT-5.1 Codex Max is more intelligent. It scores 62 compared with 56 on the composite Intelligence Index.

Which model is faster?

GPT-5.1 Codex Max is faster, generating 95 tokens per second compared with 70 tokens per second.

Which model is cheaper to run?

Devstral 2 is cheaper at $0.99 per 1M tokens blended, compared with $1.87 (7:2:1 cache:input:output ratio).

Which model has lower latency?

Devstral 2 has lower latency, with a time to first token of 0.52s compared with 1.70s.

Which model has a larger context window?

GPT-5.1 Codex Max has a larger context window, supporting 400K tokens compared with 262.1K tokens.

Fazit

Sowohl GPT-5.1 Codex Max (Optimal für anspruchsvolles Enterprise-Reasoning, Softwareentwicklung und produktive KI-Workflows, Enterprise-RAG-Systeme und skalierbare API-Pipelines.) als auch Devstral 2 (Optimal für autonome Agenten-Workflows, zuverlässiges Tool-Calling und mehrstufige Automatisierung, Enterprise-RAG-Systeme und skalierbare API-Pipelines.) überzeugen im Produktionseinsatz: GPT-5.1 Codex Max führt bei komplexem Reasoning und Coding, GPT-5.1 Codex Max liefert den höheren Token-Durchsatz und Devstral 2 ist die kosteneffizienteste Wahl für große API-Workloads.

Häufig gestellte Fragen (FAQ)

Welches Modell ist besser für Coding und Reasoning – GPT-5.1 Codex Max oder Devstral 2?+

Im Gesamt-Intelligenzindex und bei Software-Benchmarks liegt GPT-5.1 Codex Max vorn. Prüfen Sie oben die SWE-bench- und GPQA-Werte für Ihren Anwendungsfall.

Wie unterscheiden sich die API-Preise von GPT-5.1 Codex Max und Devstral 2?+

GPT-5.1 Codex Max kostet $1.75 / $14.00 pro 1M Input-/Output-Tokens, Devstral 2 liegt bei $1.50 / $4.50. Beim gewichteten Gesamtpreis ist Devstral 2 günstiger.

Welches Modell hat das größere Kontextfenster und die höhere Geschwindigkeit?+

GPT-5.1 Codex Max bietet 400K Tokens Kontext gegenüber 262.1K Tokens bei Devstral 2. Bei der Generierungsgeschwindigkeit liegt GPT-5.1 Codex Max vorn.

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.

Offizielle Quellen: Offizielle API-Dokumentation von OpenAI und Mistral AI, Systemkarten und unabhängige Benchmark-Auswertungen (2026).