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Home/Best GPT-5.4 Alternatives
Best alternative: Claude Fable 5Alternatives

Best GPT-5.4 Alternatives

Claude Fable 5 is the strongest alternative to GPT-5.4 — it scores 100 vs 90 on coding at $10/1M input (GPT-5.4 costs $2.5/1M). Grok 4 is the budget swap: $2/1M input is 20% cheaper. DeepSeek V3 is the top open-weight option if you want a model you can self-host.

Last verified Jul 2, 2026/Model data modified Jul 2, 2026
Rankings refresh dailyScored on 6 criteriaNo paid rankings
AnthropicPremium
Input cost
$10.00/1M
Context
1M tokens
Speed
Deliberate

Clear recommendation block

The shortest way to see the safest default, the lower-cost option, and the specialist pick before you read deeper.

Best overall model

Claude Fable 5

View
Why this recommendation

Claude Fable 5 is the safest overall answer here when you want the strongest default instead of the lowest list price.

AnthropicPremium
Best for
The hardest coding tasks, autonomous multi-step agents, and frontier-grade reasoning
Price
$10.00/1M
Context
1M tokens
Best budget model

Meta: Llama 3.1 8B Instruct

View
Why this recommendation

Meta: Llama 3.1 8B Instruct is the lower-cost option to start with when you still need useful output at scale.

MetaBudget
Best for
High-throughput applications where cost and speed matter more than frontier-level quality, such as chatbots, content classification, and text summarization.
Price
$0.02/1M
Context
16k tokens
Best for speed

Grok 4

View
Why this recommendation

Grok 4 is the better pick when response speed matters more than maximum reasoning depth.

xAIBalanced
Best for
Coding and research at competitive pricing with maximum context
Price
$1.25/1M
Context
2M tokens

Why this page recommends it

Claude Fable 5 beats GPT-5.4 on coding (100 vs 90) at $10/1M input tokens.

Grok 4 cuts input cost by 20% ($2 vs $2.5/1M) while scoring 92/100 on coding.

DeepSeek V3 is open-weight — self-host it or run it via low-cost API providers at $0.27/1M input.

Decision notes

Choose Claude Fable 5 when you want the closest overall replacement — the hardest coding tasks.

Choose Grok 4 when token volume matters more than peak quality — it is 20% cheaper on input.

Staying with OpenAI? GPT-5.5 is the strongest in-house switch at $5/1M input.

Interactive decision lab

Test the recommendation against your priority

Switch the scoring lens to see whether the top answer changes when you care more about cost, speed, or long-document work.

#1Claude Fable 591 pts
#2Claude Mythos 590 pts
#3GPT-5.587 pts
#4GPT-5.481 pts
#5Grok 481 pts
Quality first

Claude Fable 5

Anthropic / Premium / Jun 9, 2026

91

New global #1 — 80.3% SWE-Bench Pro, the most capable model generally available.

Ranks models by the broadest mix of coding, writing, research, and long-context usefulness.

Cost
$10.00/1M
$50.00/1M out
Speed
Deliberate
2/100 score
Context
1M tokens
input window
View model
Data-backed recommendation
Avoid this pick if

You are latency- or cost-sensitive, or your tasks don't need frontier-level reasoning — Opus 4.8 at half the price is plenty.

Recommended comparisons

The fastest way to see where the recommendation shifts when your priority changes.

OpenAIPremiumBest alternative: Claude Fable 5

GPT-5.4

Best for agentic automation and desktop control workflows.

Best use case
Agentic workflows, desktop automation, and complex multi-step reasoning
Input
$0.20/1M
Pricing
Premium
Speed
Balanced
Context
272k tokens
AgenticDesktop controlReasoning
AnthropicPremiumOption 2

Claude Fable 5

New global #1 — 80.3% SWE-Bench Pro, the most capable model generally available.

Best use case
The hardest coding tasks, autonomous multi-step agents, and frontier-grade reasoning
Input
$10.00/1M
Pricing
Premium
Speed
Deliberate
Context
1M tokens
Coding leaderSWE-Bench Pro #1Mythos-class
xAIBalancedOption 3

Grok 4

Strong coding value with 2M context — an underrated pick at this price.

Best use case
Coding and research at competitive pricing with maximum context
Input
$1.25/1M
Pricing
Balanced
Speed
Fast
Context
2M tokens
Coding2M contextValue
DeepSeekBudgetOption 4

DeepSeek V3

GPT-4o-class coding quality at under $0.30/1M — the best value in the directory.

Best use case
Coding, reasoning, and general tasks at extreme cost efficiency
Input
$0.27/1M
Pricing
Budget
Speed
Fast
Context
128k tokens
Open sourceBudgetCoding
OpenAIPremiumOption 5

GPT-5.5

Best OpenAI flagship for agentic coding, research, and computer-use work.

Best use case
Agentic coding, computer-use workflows, and complex research tasks
Input
$5.00/1M
Pricing
Premium
Speed
Balanced
Context
1M tokens
AgenticCodingComputer use
AnthropicPremiumOption 6

Claude Mythos 5

The frontier ceiling — same model as Fable 5, safeguards lifted, partner-only.

Best use case
Frontier cybersecurity research, autonomous vulnerability discovery, and the absolute capability ceiling
Input
$10.00/1M
Pricing
Premium
Speed
Deliberate
Context
1M tokens
FrontierRestricted accessCybersecurity

Pros

80.3% SWE-Bench Pro — the new #1, up from Opus 4.8's 69.2% and GPT-5.5's 58.6%

1932 on GDPval-AA, ahead of Opus 4.8 (1890) and GPT-5.5 (1769)

1M-token context at standard pricing, 128K max output per request

Mythos-class capability released for general use with new cyber-risk safeguards

Cons

Priced at $10/$50 per 1M tokens — double Opus 4.8 ($5/$25)

Deliberate pace; not for latency-sensitive interactive apps

Standard-use safeguards block some high-risk security workloads (use Mythos 5 with partner access)

Explore related decisions

Browse all modelsCompare pricingView GPT-5.4View Claude Fable 5View Grok 4GPT 5 4Claude Fable 5Claude Fable 5 vs GPT-5.4Grok 4 vs GPT-5.4Best cheap AICompare models side by side

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FAQ

What is the best alternative to GPT-5.4?

Claude Fable 5 is the strongest overall alternative. It scores 100/100 on coding (GPT-5.4: 90/100) and costs $10/1M input vs $2.5/1M. New global #1 — 80.3% SWE-Bench Pro, the most capable model generally available.

What is the cheapest good alternative to GPT-5.4?

Grok 4 at $2/1M input — 20% cheaper than GPT-5.4's $2.5/1M. It scores 92/100 on coding, so expect a quality step down on the hardest tasks.

Is there an open-source alternative to GPT-5.4?

Yes — DeepSeek V3 is the strongest open-weight alternative (coding: 87/100). You can self-host it or use hosted APIs at $0.27/1M input, and there are no per-seat subscription fees.

What is the best OpenAI alternative to GPT-5.4?

GPT-5.5 — same provider, same API surface, $5/1M input vs $2.5/1M. Best OpenAI flagship for agentic coding, research, and computer-use work.

Is GPT-5.4 still worth using in 2026?

Best choice when you need a model that can operate software autonomously at the older GPT-5.4 price tier.