LLM Reference

GPT-5.4 vs Qwen3.5-397B-A17B

GPT-5.4 (2026) and Qwen3.5-397B-A17B (2026) are frontier-tier reasoning models from OpenAI and Alibaba. GPT-5.4 ships a 1.05m-token context window, while Qwen3.5-397B-A17B ships a 262k-token context window. On MMLU PRO, Qwen3.5-397B-A17B leads by 0.3 pts. On pricing, GPT-5.4 ranges from $2.50 to $5/1M input tokens by tier; Qwen3.5-397B-A17B costs $0.39/1M input tokens. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.

GPT-5.4 fits 4x more tokens; pick it for long-context work and Qwen3.5-397B-A17B for tighter calls.

Decision scorecard

Local evidence first
SignalGPT-5.4Qwen3.5-397B-A17B
Best forreasoning-heavy apps, multimodal apps, and tool-calling agentsreasoning-heavy apps, multimodal apps, and tool-calling agents
Decision fitCoding, RAG, and AgentsCoding, RAG, and Agents
Context window1.05m262k
Cheapest output$15/1M tokens$2.34/1M tokens
Provider routes4 tracked4 tracked
Shared benchmarks8 sharedMMLU PRO leader

Decision tradeoffs

Choose GPT-5.4 when...
  • GPT-5.4 holds a shared-benchmark lead on Google-Proof Q&A, ahead by 2.7 points.
  • GPT-5.4 has the larger context window for long prompts, retrieval packs, or transcript analysis.
  • GPT-5.4 uniquely exposes Code execution in local model data.
  • Local decision data tags GPT-5.4 for Coding, RAG, and Agents.
Choose Qwen3.5-397B-A17B when...
  • Qwen3.5-397B-A17B holds a shared-benchmark lead on MMLU PRO, ahead by 0.3 points.
  • Qwen3.5-397B-A17B has the lower cheapest tracked output price at $2.34/1M tokens.
  • Local decision data tags Qwen3.5-397B-A17B for Coding, RAG, and Agents.

Monthly cost at traffic

Estimate token spend from the cheapest tracked input and output route or tier on this page.

Lower estimate Qwen3.5-397B-A17B

GPT-5.4

$5,750

Cheapest tracked route/tier: OpenAI API

Qwen3.5-397B-A17B

$897

Cheapest tracked route/tier: OpenRouter

Estimated monthly gap: $4,853. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

GPT-5.4 -> Qwen3.5-397B-A17B
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • Qwen3.5-397B-A17B is $12.66/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
  • Check replacement coverage for Code execution before moving production traffic.
Qwen3.5-397B-A17B -> GPT-5.4
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • GPT-5.4 is $12.66/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
  • GPT-5.4 adds Code execution in local capability data.

Specs

Specification
Released2026-03-052026-02-16
Context window1.05m262k
Parameters—397B
ArchitectureDecoder OnlyMixture of Experts
LicenseProprietaryApache 2.0OSI-approved
OpennessProprietaryOpen source
WeightsNot releasedAvailable
CodeUnknownUnknown
Commercial useCommercial use: conditionalCommercial use: permitted
Knowledge cutoff2025-08-

Pricing and availability

Pricing attributeGPT-5.4Qwen3.5-397B-A17B
Input price
0-272,000t
$2.50/1M tokens
272,000t+
$5/1M tokens
$0.39/1M tokens
Output price
0-272,000t
$15/1M tokens
272,000t+
$22.50/1M tokens
$2.34/1M tokens
Providers
OpenAI APIOpenRouterVercel AI GatewayAWS Bedrock
OpenRouterTogether AIAlibaba Cloud PAI-EASNovita AI

Capabilities

CapabilityGPT-5.4Qwen3.5-397B-A17B
VisionYesYes
MultimodalYesYes
ReasoningYesYes
JSON / Tool useYesYes
Structured outputsYesYes
Code executionYesNo
IDE integrationNoNo
Computer useNoNo
Parallel agentsNoNo

Benchmarks

BenchmarkGPT-5.4Qwen3.5-397B-A17B
MMLU PRO87.587.8
SWE-bench Verified71.776.2
Google-Proof Q&A92.089.3
Massive Multi-discipline Multimodal Understanding82.185.0
Humanity's Last Exam41.628.7
Terminal-Bench 2.075.152.5
τ-bench78.386.7
MultiChallenge69.267.6

Continue comparing

Model pages
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Last reviewed: 2026-06-29. Data sourced from public model cards and provider documentation.