LLM Reference

Claude Opus 4.6 vs GPT-4o (2024-11-20)

Claude Opus 4.6 (2026) and GPT-4o (2024-11-20) (2024) are frontier reasoning models from Anthropic and OpenAI. Claude Opus 4.6 ships a 1m-token context window, while GPT-4o (2024-11-20) ships a 128k-token context window. On Massive Multi-discipline Multimodal Understanding, Claude Opus 4.6 leads by 5.8 pts. On pricing, GPT-4o (2024-11-20) costs $2.50/1M input tokens versus $5/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.

GPT-4o (2024-11-20) is ~100% cheaper at $2.50/1M; pay for Claude Opus 4.6 only for coding workflow support.

Decision scorecard

Local evidence first
SignalClaude Opus 4.6GPT-4o (2024-11-20)
Best forreasoning-heavy apps, multimodal apps, and tool-calling agentsprovider-routed production
Decision fitCoding, RAG, and AgentsCoding, RAG, and Long context
Context window1m128k
Cheapest output$25/1M tokens$10/1M tokens
Provider routes6 tracked2 tracked
Shared benchmarksMassive Multi-discipline Multimodal Understanding leader1 shared

Decision tradeoffs

Choose Claude Opus 4.6 when...
  • Claude Opus 4.6 holds a shared-benchmark lead on Massive Multi-discipline Multimodal Understanding, ahead by 5.8 points.
  • Claude Opus 4.6 has the larger context window for long prompts, retrieval packs, or transcript analysis.
  • Claude Opus 4.6 has broader tracked provider coverage for fallback and route flexibility.
  • Claude Opus 4.6 uniquely exposes Vision, Multimodal, and Reasoning in local model data.
  • Local decision data tags Claude Opus 4.6 for Coding, RAG, and Agents.
Choose GPT-4o (2024-11-20) when...
  • GPT-4o (2024-11-20) has the lower cheapest tracked output price at $10/1M tokens.
  • Local decision data tags GPT-4o (2024-11-20) for Coding, RAG, and Long context.

Monthly cost at traffic

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

Lower estimate GPT-4o (2024-11-20)

Claude Opus 4.6

$10,250

Cheapest tracked route/tier: Anthropic

GPT-4o (2024-11-20)

$4,500

Cheapest tracked route/tier: OpenRouter

Estimated monthly gap: $5,750. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

Claude Opus 4.6 -> GPT-4o (2024-11-20)
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • GPT-4o (2024-11-20) is $15/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
  • Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
GPT-4o (2024-11-20) -> Claude Opus 4.6
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • Claude Opus 4.6 is $15/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
  • Claude Opus 4.6 adds Vision, Multimodal, and Reasoning in local capability data.

Specs

Specification
Released2026-02-052024-11-20
Context window1m128k
Parameters——
ArchitectureDecoder OnlyDecoder Only
LicenseProprietaryProprietary
OpennessProprietaryProprietary
WeightsNot releasedNot released
CodeUnknownUnknown
Commercial useCommercial use: conditionalCommercial use: conditional
Knowledge cutoff2025-122023-10

Pricing and availability

Pricing attributeClaude Opus 4.6GPT-4o (2024-11-20)
Input price$5/1M tokens$2.50/1M tokens
Output price$25/1M tokens$10/1M tokens
Providers
AnthropicAWS BedrockGCP Vertex AIMicrosoft FoundryOpenRouterVercel AI Gateway
OpenRouterOpenAI API

Capabilities

CapabilityClaude Opus 4.6GPT-4o (2024-11-20)
VisionYesNo
MultimodalYesNo
ReasoningYesNo
JSON / Tool useYesNo
Structured outputsYesYes
Code executionYesNo
IDE integrationNoNo
Computer useNoNo
Parallel agentsNoNo

Benchmarks

BenchmarkClaude Opus 4.6GPT-4o (2024-11-20)
Massive Multi-discipline Multimodal Understanding76.570.7

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Model pages
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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.