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Data points: 63

On this page

Key TakeawaysComparison sheetBenchmark score comparisonAPI audit comparisonProvider examplesWhen to choose each modelFAQRelated compare reports

Key Takeaways

The readout for Claude Opus 4.6 and GPT-3.5 Turbo Instruct, before the detailed comparison sheet.

Decision read

Claude Opus 4.6

Claude Opus 4.6 currently has the stronger profile, with verified wins split 4 to 0.

Evidence depth

63 data points

Includes 0 benchmark rows, 0 audit samples, and 9 provider examples.

Selection signal

Start with Claude Opus 4.6

The charts below split 9 high-signal samples across speed, scores, and audit health.

Change comparison

Switch either side of this report to compare another model with the same LMSpeed data pipeline.

Select a different model to open a new comparison URL.

Model compare

Claude Opus 4.6 vs GPT-3.5 Turbo Instruct

claude-opus-4-6-vs-gpt-3-5-turbo-instruct

Model A

Claude

Claude Opus 4.6

Model B

OpenAI

GPT-3.5 Turbo Instruct

Overall leaderLeadingContender
Verified metric wins4 wins0 wins
Where it leadsCheapest input price, Free providers, Provider coverage, Recent testsNo data
Model metadataClaude Opus 4.6 exposes 1M tokens; notable signals: Text input, Image input, File input, Text output.GPT-3.5 Turbo Instruct exposes 4.1K tokens; notable signals: Text input, Text output, Structured outputs, JSON mode.
DeveloperAnthropicOpenAI
Context window1M tokens4.1K tokens
Max output128K tokens4.1K tokens
ReleasedApr 2026Sep 2023
Modalities

Input

TextImageFile

Output

Text

Input

Text

Output

Text
Features
Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning
Text inputText outputStructured outputsJSON mode
ParametersNo dataNo data
TokenizerClaudeGPT
Knowledge cutoffNo data2021-09-30
OpenRouter IDanthropic/claude-opus-4.6-fastopenai/gpt-3.5-turbo-instruct
ReferencesNo dataNo data

Benchmark score comparison

Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.

Category performance

Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.

Model A coverage
7 / 8
Model B coverage
0 / 8
Shared
0 shared categories
Claude Opus 4.6GPT-3.5 Turbo Instruct
Category performanceCompare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.AgentsCodingReasoningKnowledgeMathMultilingualMultimodalInstruction following

Avg. score

Claude Opus 4.6

65.8

Avg. score

GPT-3.5 Turbo Instruct

-

Selected category

Agents

Claude Opus 4.6

Professional benchmark details

Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.

No shared professional benchmark scores are available yet.

API audit comparison

Latest completed audits from shared providers, with four safety and integrity score groups plus report links.

Provider
ClaudeClaude Opus 4.6
OpenAIGPT-3.5 Turbo Instruct
No completed audits are available from shared providers yet.

Provider examples

Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.

Provider
ClaudeClaude Opus 4.6
OpenAIGPT-3.5 Turbo Instruct
Cuz AI5 tests
Claude

Claude Opus 4.6

speed / latency

43 tok/s / 2285ms

input / output

No data

OpenAI

GPT-3.5 Turbo Instruct

speed / latency

N/A / N/A

input / output

No data

42公益站0 tests
Claude

Claude Opus 4.6

speed / latency

N/A / N/A

input / output

No data

OpenAI

GPT-3.5 Turbo Instruct

speed / latency

N/A / N/A

input / output

No data

AAAI0 tests
Claude

Claude Opus 4.6

speed / latency

N/A / N/A

input / output

No data

OpenAI

GPT-3.5 Turbo Instruct

speed / latency

N/A / N/A

input / output

No data

AI API0 tests
Claude

Claude Opus 4.6

speed / latency

N/A / N/A

input / output

No data

OpenAI

GPT-3.5 Turbo Instruct

speed / latency

N/A / N/A

input / output

No data

AIGCBAR0 tests
Claude

Claude Opus 4.6

speed / latency

N/A / N/A

input / output

No data

OpenAI

GPT-3.5 Turbo Instruct

speed / latency

N/A / N/A

input / output

No data

Seamee API
Claude

Claude Opus 4.6

claude-opus-4.6

speed / latency

No data

input / output

$0/M / $0/M

OpenAI

GPT-3.5 Turbo Instruct

gpt-3.5-turbo-instruct

speed / latency

No data

input / output

$1.50/M / $2.00/M

KKSJ-AI
Claude

Claude Opus 4.6

claude-opus-4-6-thinking

speed / latency

No data

input / output

$9.25/M / $46.23/M

OpenAI

GPT-3.5 Turbo Instruct

gpt-3.5-turbo-instruct

speed / latency

No data

input / output

$0.185/M / $0.370/M

DreamChatBot
Claude

Claude Opus 4.6

claude-opus-4-6

speed / latency

No data

input / output

$0.685/M / $3.42/M

OpenAI

GPT-3.5 Turbo Instruct

gpt-3.5-turbo-instruct

speed / latency

No data

input / output

$0.205/M / $0.411/M

PoloAPI
Claude

Claude Opus 4.6

claude-opus-4-6

speed / latency

No data

input / output

$0.685/M / $3.42/M

OpenAI

GPT-3.5 Turbo Instruct

gpt-3.5-turbo-instruct

speed / latency

No data

input / output

$0.205/M / $0.274/M

When to choose each model

This report only uses LMSpeed data for Claude Opus 4.6 and GPT-3.5 Turbo Instruct: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Guidance
ClaudeClaude Opus 4.6
OpenAIGPT-3.5 Turbo Instruct
When to choose each model

Claude Opus 4.6

Claude Opus 4.6 is stronger when you prioritize Cheapest input price, Free providers, Provider coverage, Recent tests.

GPT-3.5 Turbo Instruct

GPT-3.5 Turbo Instruct does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing.

FAQ

TL;DR: Claude Opus 4.6 leads across 63 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.

Why is this comparison indexable?
It has 4 verifiable comparison points, and both models have pricing or benchmark data.
Are missing metrics invented?
No. Metrics without LMSpeed data are omitted from this report.

Related compare reports

Continue from Claude Opus 4.6 vs GPT-3.5 Turbo Instruct into nearby model comparisons with enough verified LMSpeed data.

ClaudeClaude Opus 4.6 vs GPT-5.46 verified data pointsClaudeClaude Opus 4.6 vs GPT-56 verified data pointsClaudeClaude Opus 4.6 vs Gemini 2.5 Pro6 verified data pointsClaudeClaude Opus 4.6 vs GPT-5.26 verified data points

Data as of Jun 19, 2026, 09:31 AM·Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.